Animated loader · qwen3.8-flash

Let me start by looking at the current directory.

GSAP 3.12.5 free core. Let me build the index.html with:
- Dark background
- Group of rounded geometric shapes (SVG rects with rx animatable, or divs with border-radius) that smoothly change scale, position, corner radius
- Row of five dots with staggered motion/opacity
- GSAP timeline, total 3-6 seconds, loops seamlessly (repeat: -1, yoyo or make sure the last keyframe returns to the start state to avoid an abrupt jump)
- Pause/Resume/Restart controls
- Centered

For a seamless loop without an abrupt jump: I'll design the timeline so the end state equals the start state (shapes return home), then repeat: -1 with no yoyo. Also animate SVG `rx` for corner radius using attr tween, plus CSS border-radius for divs.

Let me use inline SVG for the shape group (so I can animate rx via attr) and HTML dots. Actually maybe simpler: shapes as SVG rounded rects + circles, with a morph-like approach animating rx from small to large.

Plan:
- SVG viewBox 0 0 560 320, centered. Inside: 5 rounded rects (shapes) arranged in an arc/cluster; animate scale (transform via gsap with svgOrigin), x/y position, rotation, and rx via attr.
- Below: a row of 5 dots (HTML divs) that stagger up/down with opacity/size.
- Timeline duration ~4.4s total, looping seamlessly.

Key: avoid growing number of animation instances — build one timeline, use `tl.restart()` for restart, no re-creating on each click. Pause/resume with tl.pause()/tl.resume(). Also use gsap.ticker-driven UI update for a progress readout maybe. Keep it clean.

Let me also add a progress bar showing timeline progress (nice, and helps verification). And state label.

Timeline structure (seamless: start == end):
- 0.0: shapes at home, small rx (sharp-ish), scale 0.7, opacity low
- Use a set of tweens at positions.
- Ensure all shapes' transforms and rx come back to initial values by end.

Design choreography:
1. "bloom": shapes spread from center cluster to positions (0 → 1.1s), scale 0.55→1, rx 6→26
2. "wave": shapes travel along positions offsets, rx oscillate to circle (rx = half size) (1.1 → 2.4s)
3. "converge/rotate": shapes pull inward, spin, rx back to 6, scale back to 0.55 (2.4 → 4.4s) with easing `sine.inOut` so it's smooth at the loop boundary too.

Dots: staggered y-bounce with opacity, each repeating in the loop with stagger offsets so total pattern returns.

To be safe about "no abrupt jump" — the end state matches start state exactly and velocities are near zero at the boundary (use ease "power2.inOut" on last tween and "power2.out" on first, so movement starts slow).

Actually simplest robust approach: make the *entire* loop a yoyo-free cycle where the last tween ends at the start values, using eases that make derivative ~0 at both ends (sine.inOut). Good.

Let me also add subtle glow/pulse via CSS-only? No, better drive everything from the timeline so pause freezes everything. Pause freezes the timeline position — CSS animations would keep going. So avoid CSS keyframe animations entirely (except maybe non-essential background gradient which is static). I'll drive all motion with the timeline. Maybe a soft ambient pulse also in the timeline.

Controls: buttons Pause/Resume (toggle), Restart. Also show time/progress.

Also add keyboard: space = pause/resume, R = restart. Nice touch.

Let me write the file.

For SVG rect scaling around own center with GSAP: use `transformOrigin: "center center"` — GSAP supports SVG transform origin in percent for svg elements (svgOrigin vs transformOrigin). `transformOrigin: "50% 50%"` works on SVG elements in GSAP 3 (it computes relative to the element's bounding box). Yes, GSAP 3 handles SVG transformOrigin percentages properly.

I'll build shapes with a helper in JS creating SVG rects, or write them inline in HTML. Inline SVG in HTML with ids is clearer.

Let me define 6 shapes arranged in a ring. Each with base position on ring radius R=95 around center (280,160), size 62. Home state (loop boundary state): ring collapsed toward center with scale 0.45, rx 10, opacity 0.25? Hmm at the loop point opacity should be low so the "reset" is invisible-ish. But requirement says restart returns to beginning — beginning composition visible. Let's make beginning: shapes clustered tight in center, small scale, low-ish opacity (0.35), sharp corners. Then bloom outward.

Wait — but positions: I'll animate `x`/`y` (GSAP translates) from cluster offsets to ring offsets.

Let me compute per shape i (0..5):
angle = i * 60deg
ring position: cx + R*cos, cy + R*sin (offsets relative to the shape's base x/y attributes which I'll set to center of the SVG minus half size).

Base attributes: x = 280 - 31 = 249, y = 160 - 31 = 129, width=height=62.

Then translate offsets: cluster offset small random-ish (e.g., angle spread at r=22), ring offset at R=95.

Animate rx from 10 → 31 (full circle) → 10.

Let me set data in JS with an array of shape configs and use tl.to with stagger for the group tweens (stagger gives per-shape delay). Use `tl.to(shapes, {attr:{rx:31}, duration:1.1, ease:'sine.inOut', stagger:0.08}, 0.2)`.

For x/y, I'll tween each shape's custom target offsets. Approach: define for each shape a set of keyframes in `keyframes` array on a single staggered tween? Simpler: use three tweens:

A) bloom (t=0 → 1.2, ease power2.out... but sine.out for smooth): x: ring offsets, y: ring offsets, scale: 1, rotation: 30
B) wave (t=1.2 → 2.6): x: ring offsets scaled by 1.18 with per-shape wobble, y:..., rotation: 60, scale: 1.12, rx: 31 (circles)
C) return (t=2.6 → 4.4, ease sine.inOut): back to cluster offsets, scale 0.45, rotation 0 (or 360 for spin? rotation 0 to keep start identical — but rotating a square-ish rounded shape, ending at 360 == 0 visually. Use rotation: 360 to give a full spin but visually identical at boundary. Since start state after restart is set by gsap to 0... if loop continues, rotation ends at 360 which is visually same as 0. Then next iteration starts from 360 and ends at 720 etc — the number grows but visually fine. Better to keep rotation returning: tween rotation to -30 then back to 0. I'll do: A rotation: 25, B rotation: -20, C rotation: 0. Fine.

For the x/y offsets with stagger, GSAP stagger can be a function of index for value offsets? `stagger: {each: 0.06, from:'center'}` gives delay only. To give per-element different targets, I can use `x: (i, target) => ...` — GSAP supports function-based values in tweens! Yes: `tl.to(shapes, { x: (i) => ringX[i], ... })`. Great, function-based values work with attr too? `attr: {rx: (i)=>...}` — function-based values supported in attr? I believe GSAP function-based values work on most props including attr. Let me just use a fixed rx value for group tweens; per-shape rx differences can come from staggered timing.

Also need initial state set at start: use `gsap.set` before timeline, or tl.set at position 0. For restart to return to beginning composition, the tweens' from-values must be recorded. GSAP records the start values when the tween first renders. Since I `gsap.set` the initial state before building, tweens are `to` tweens with defined end values, and restart rewinds to those recorded start values. Good. But careful: `attr: {rx: ...}` tweens are `to` — first render records from. Fine.

Also I'll use `repeat: -1` on the timeline. And for seamless loop, total duration 4.4s.

Dots: 5 HTML divs. Tween y with stagger and yoyo? To make it loop cleanly, use a wave: `tl.to(dots, {duration:0.5, y:-18, scale:1.35, opacity:1, ease:'sine.inOut', stagger:{each:0.1, repeat:0, yoyo:true}}, 0.3)` — hmm, stagger with yoyo repeat inside a staggered tween: stagger config supports `each, from, amount, repeat, yoyo`. So a single tween with stagger yoyo gives a wave that returns to start. 

But careful: if a stagger has yoyo true and repeat 1 per element, the tween duration covers amount + duration. Let's do: dots base opacity 0.25, y 0, scale 0.8. Wave tween at t=0.5: `stagger: {each: 0.14, yoyo: true, repeat: 1}` with duration 0.45 → each dot goes up and back. Total = 0.45 + 4*0.14 + 0.45 = 1.46s. Fits.

Second dot pulse later at t=2.4 similar. Then ensure dots end at base state (yoyo guarantees).

Also add a "progress" arc or track line. Let me add a thin track under dots whose scaleX follows tl.progress() via onUpdate (that's fine, driven by timeline).

Also a glow blob behind shapes pulsing with timeline.

Controls UI: buttons with labels, disabled states, time display "1.24s / 4.40s". Also loop count display maybe to demonstrate no instance growth. Good idea: show "loops: N" from onRepeat — demonstrates single timeline.

Let me write it.

Also make sure `prefers-reduced-motion`? Not required. Skip but could add. Keep it simple-ish but polished.

Viewport: 1200x800 in the browser tool. Center with flexbox full viewport height.

Let me write index.html.

One concern: gsap.set on SVG elements for x/y offsets and transformOrigin. Set `transformOrigin: '50% 50%'` once for shapes.

Let me now write code.

```html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Loop — GSAP Loading Composition</title>
<style>...</style>
</head>
<body>
  <main class="stage">
    <div class="halo" id="halo"></div>
    <svg class="shapes" viewBox="0 0 560 320" width="560" height="320" aria-hidden="true">
      <defs>
        <linearGradient id="grad" ...>
        <filter id="soft">...</filter>
      </defs>
      <g id="group">
        <rect class="shape" ... x="249" y="129" width="62" height="62" rx="10"/> x6
      </g>
    </svg>
    <div class="dots" id="dots"><span class="dot"></span> x5</div>
    <div class="track"><div class="track-fill" id="trackFill"></div></div>
    <p class="readout" id="readout">…</p>
    <div class="controls">
      <button id="btnToggle">Pause</button>
      <button id="btnRestart">Restart</button>
    </div>
  </main>
  <script src="gsap.min.js"></script>
  <script>...</script>
</body>
</html>
```

Colors: dark bg #0a0e14 gradient; shapes with gradient stroke/fill in teal → amber. Let me use palette: bg deep indigo #070b16, shapes fill gradient #22d3ee (cyan) to #a78bfa (violet), accent dots #f9a8d4/#fbbf24. I'll pick: cyan #38e1c0, violet #8b7cf6, amber #ffb454.

Shape fill: use a per-shape color from a palette array, with soft opacity, plus stroke of same color lighter. Rounded geometric shapes — rects with rx animation. Also add a couple of circles? The rx animating to half-size makes circles from squares, nice.

Let me write the JS carefully.

```js
const shapes = gsap.utils.toArray('#group .shape');
const dots = gsap.utils.toArray('#dots .dot');
const CX = 280, CY = 160, S = 62, HALF = S/2;
const N = shapes.length; // 6
const clusterR = 20, ringR = 104, waveR = 122;
function ring(i, r, spreadPhase=0){
  const a = (i / N) * Math.PI * 2 - Math.PI/2 + spreadPhase;
  return {x: Math.cos(a)*r, y: Math.sin(a)*r*0.62};
}
```
Flatten ellipse y for a nicer composition (viewBox 560x320).

Initial (home) offsets: cluster at r=16 with slight per-shape jitter.

Tween A bloom: to ring offsets r=104, scale 1, rx 31? Hmm rx 31 makes full circles; maybe bloom to rx 18 (rounded squares), wave to rx 31 (circles), return to rx 8 (sharper rounded). That gives "smoothly change corner radius". But rx max = 31 (half of 62) = circle. Use base rx 8 at home.

Wait home state must be what restart shows. Home: tight cluster, scale 0.42, rx 8, opacity 0.55.

Let me also add stroke-width variation. Keep moderate.

Timeline:
```js
const tl = gsap.timeline({repeat:-1, defaults:{ease:'sine.inOut'}, onUpdate: render, onRepeat: ()=>{loops++}});
```

Set initial:
```js
gsap.set(shapes, {transformOrigin:'50% 50%', x:(i)=>home[i].x, y:(i)=>home[i].y, scale:0.42, rotation:0, opacity:0.5, attr:{rx:8, ry:8}});
gsap.set(dots, {y:0, scale:0.72, opacity:0.28});
```
Hmm, ry should follow rx: for square rects rx=ry is fine. Animate attr rx and ry. Actually GSAP can tween both: `attr:{rx:22, ry:22}`. Or just set rx (SVG: if ry not specified, it defaults to rx value... per spec, if ry is omitted, ry = rx? For rect, ry defaults to rx if not specified; and if rx specified and ry specified both. Actually spec: "if rx is not specified, defaults to ry; if ry not specified, defaults to rx". So only animate rx and don't set ry attribute → ry follows rx automatically. Good, just use rx.

Now, careful: does `attr` support function-based values? Let me avoid needing it. I'll use x/y function-based (well supported).

Timeline build:

```js
const T = 4.4;
tl.to(shapes, {duration:1.15, x:(i)=>ringOff(i,ringR).x, y:(i)=>ringOff(i,ringR).y, scale:1, rotation:(i)=> (i%2? 18: -18), opacity:1, attr:{rx:18}, ease:'power2.out', stagger:{each:0.07, from:'start'}}, 0)
  .to(shapes, {duration:1.0, x:(i)=>ringOff(i,waveR, 0.35).x, ...}, 1.25)
```

Hmm, careful: the rotation end must return to 0 for restart-consistency; not strictly necessary but from-values recorded on first play. Since it's a `to` tween chain, each subsequent tween uses previous end as start, and looping back to the first tween's recorded start = the home state we set. Good — as long as the last tween ends at home values exactly.

Last tween C: to home offsets, scale 0.42, rotation 0, opacity 0.5, rx 8, duration 1.5, ease sine.inOut. Then loop restarts with tween A from those values = recorded start values (identical to home). No jump.

But rotation: A ends 18/-18, B ends 45/-45? then C ends 0. Good.

Dots: two waves. At 0.25 and at 2.35, plus opacity flicker. Also dots base scale 0.72 → wave.

Halo (background glow): scale 0.8→1.15→0.8, opacity.

Total timeline duration must be within 3–6s: the longest chain determines it. Ensure everything ends ≤ 4.4. Tween C starts at 2.9, duration 1.5 → ends 4.4. Let me lay out:

- A: start 0, dur 1.15 → 1.15 (with stagger amount 0.35 → ends 1.5). Hmm stagger adds delay; total = 1.15 + 5*0.07 = 1.5.
- B: start 1.5, dur 0.9 (+stagger) → ends 1.5+0.9+0.35 = 2.75.
- C: start 2.75, dur 1.65 (+stagger 0.35) → ends 4.75. Total ≈ 4.75s. In range (3–6). Good.

Dots waves: first at 0.3 (dur 0.45, stagger each 0.13 yoyo repeat1 → total 0.45+0.52+0.45=1.42 ends 1.72). Second at 2.6 → ends ~4.0. Third? maybe one at 3.6 short. Keep ends ≤ 4.75.

Alternatively simpler: give dots a continuous traveling wave: `tl.to(dots,{duration:0.6, y:-16, scale:1.15, opacity:0.95, ease:'sine.inOut', stagger:{each:0.12, yoyo:true, repeat:1}}, position)` repeated 3 times at 0.2, 1.7, 3.4. Each spans ~1.3s. Third ends 3.4+1.3=4.7 ≤ 4.75. 

Also the "track fill" scaleX: driven by onUpdate from tl.progress(), not part of timeline. Fine, freezes on pause naturally.

Readout: time / duration, loops count, state.

Controls:
- btnToggle: if tl.isActive() && !tl.paused() → pause; else resume. Label swaps "Pause"/"Resume".
- btnRestart: tl.restart(); if it was paused, keep paused? Requirement: "Restart returns to the beginning." I'll restart and resume playing (and update label). Actually if paused, restart should show beginning frame — tl.restart() pauses? `restart()` plays by default. I'll do: tl.restart(); if we want it to remain paused, tl.pause(0)... Simpler: restart → play from beginning, set label to "Pause". I'll also add an option: hold? No. Just restart & play, but if paused, restart and stay paused at 0 showing start composition — that's arguably better for verification. Let me do: restart keeps the play/pause state (if paused, tl.pause(0) after restart... tl.restart() then tl.pause() if wasPaused). Good.

Also verify no growth of animation instances: `gsap.getTweensOf(shapes).length` stays constant. I could display "tweens: N" in readout to prove it. Nice touch: show tween count.

Keyboard: Space toggles, R restarts.

Let me write the final file and test with the browser tool.

For sampling timeline at moments, I'll use browser tool key actions and also evaluate via console? The browser tool has actions: reload, inspect, screenshot, motion, click, drag, key, type, scroll. No "evaluate" action. So I can't run arbitrary JS in page... Hmm. I can verify visually with screenshots after clicking Pause at certain points? Not deterministic.

Alternative: I can add a debug harness in the page? Better approach: use node to test the timeline logic headless? GSAP in node without DOM won't work well (needs window/document). Actually gsap.min.js can run in node with a fake global? GSAP requires document for some things but core works in Node? It's UMD; it checks for window. Without window it may not define _window and tweens still work (gsap has SSR-ish fallback). Risky.

Let me check available tooling: maybe there's a headless browser (puppeteer/playwright) available to run a script that evaluates JS. Let me check node_modules.

I'll first write the file, then check for puppeteer/playwright availability, use the browser tool for screenshots/motion, and if puppeteer is present use it for precise timeline sampling.

Let me write.

Also add `data-seek` controls? No, keep required controls only (Pause/Resume, Restart). Maybe a scrub slider would be extra but could be considered noise; requirement says provide Pause/Resume and Restart controls. I'll add only those, plus keyboard. For verification I can expose `window.__tl` for puppeteer sampling — harmless and useful. I'll expose `window.loader = {tl, ...}`.

CSS: dark bg with radial gradients, vignette, subtle grid.

Let me write it out.

Playwright is available. I can write a node script to sample the timeline precisely. Let me check playwright browsers installed.

Let me write index.html first.

Note: `tl.totalDuration(LOOP)` on a repeating timeline with repeat:-1 — totalDuration for infinite repeat is Infinity; setting totalDuration on an infinite repeat timeline might change repeat. Actually for repeating timelines, totalDuration setter computes repeat from duration. With repeat:-1, setting totalDuration may break things. Better to remove that line and just use tl.duration() for display. Let me check duration: last tweens end: shapes C ends 2.62+1.7+0.35=4.67. dots: 3.3+ (0.45+0.44+0.45)=4.64; drift 3.55+2.0=5.55 → duration 5.55s, within 3–6 but seam mismatch. The halo/dot tweens after 4.67 extend the loop but that's fine as long as everything at the END of the timeline equals the home state (seam). The drift tween ends at xPercent 0 at 5.55 — good, that equals base state. But dots' home xPercent is 0, so fine.

Actually the risk: the timeline's duration is determined by the latest end. At end time, all props must equal their start values. Shapes C ends 4.67 → home ✓. Halo ends 2.9+1.7=4.6 → base ✓. Dots: wave3 ends 4.64 ✓, drift2 ends 5.55 → xPercent 0 ✓. So duration 5.55s and seam clean. But 5.55 is within 3-6. Hmm, but then there's a dead zone 4.67–5.55 where only dots' xPercent returns — that's OK visually (shapes holding at cluster). Slight: shapes hold home state for ~0.9s while dots settle. Acceptable but let me tighten to ~4.8s overall for better rhythm: change drift2 start to 3.2, duration 1.6 → ends 4.8. And wave3 at 3.2 ends 4.54. Then total ≈ 4.8s. Good.

Remove totalDuration line. Let me fix.

Also change the dots wave3 start from 3.3 to 3.0 so it ends before 4.8. Fine either way.

Now write a playwright verification script that:
1. loads page, captures console errors
2. samples timeline at several times (via window.loader.tl.pause(t)) and records shape transforms, rx, dot positions → check changes and seam continuity (compare state at time 0 vs duration).
3. Checks tween count constant after many loops (instance growth) — run for a while and check gsap.getTweensOf counts, and tl.repeat count.
4. Click pause → verify tl.paused() and time frozen; click resume → verify continues from paused position (not from 0).
5. Click restart → verify time ~0 and composition equals initial.

Let me find a browser executable.

~/.cache/ms-playwright has browsers. Let me write the verification script.

Note: my pause/resume test clicked #btnToggle but tl.pause() at start of samples... I set tl.resume() before. Also note during samples I paused tl and set time; then evaluate time(0)+resume. OK.

Also gsap.getProperty(s,'matrix') unused — fine.

Run it.

Everything works: duration 5.06s (within 3–6), repeat -1, seam delta 0, pause freezes, resume continues from paused position, restart returns to beginning, tween counts constant (no growth).

Wait: "loops" only 1 after 6s? Because after restart-while-paused I clicked toggle to resume... then loops counted. Actually the growth test started with tl.time(0) and ran 6s → 1 loop of 5.06s → loops=1 ✓.

One issue: RESTART WHILE PAUSED gave time 0 but my code does `tl.restart(); if (wasPaused) { tl.pause(0); tl.progress(0); tl.pause(); }` — messy but result fine (paused at 0). Let me clean that to `tl.pause(0)`.

Also loops counter resets? Not important.

The dots at t=0.6: dot0 y=-16.81 while dot4 y=0 — staggered ✓. rx changes ✓. Positions/scale/rotation ✓.

Small nit: shape x/y — at t=1.2 shape0 y=-57.6 which is ring R_BLOOM=96*0.6=57.6 ✓ top of orbit.

Let me clean the restart code and check visual screenshots. Also maybe verify the layout is centered/visible at 1200x800 — screenshots.

Let me look at the screenshots.

Wait: tl.restart() then tl.pause(0) — pause(0) sets time to 0 and pauses? In GSAP 3, `pause(position)` accepts a position parameter — yes, `pause()` inherits from `play(position, suppressEvents)`? Actually `Animation.pause(position, suppressEvents)` — GSAP 3 docs: "pause( position, suppressEvents ) : this — Pauses the animation... If a position parameter is passed in, the animation's playhead will move there first". Yes supported.

Now take screenshots in the browser tool for visual check, and also verify the loop seam visually with the motion tool.

The composition is small and positioned high-ish; the shapes cluster is tiny at this moment (bloom phase). The halo glow appears as a vertical smear — the mask creates a weird column. Let me look at a mid-bloom frame (t≈2.7) to check the ring.

Issues to improve:
1. The halo looks like a vertical band (blur + something). Actually it's the body::after grid mask? The vertical smear is likely the halo scaled with `filter: blur` plus the mask... Hmm, the halo is 420x420 circle at top:118px. In the screenshot there's a faint vertical column from y~360 to 540 — that's probably the halo (420px tall starting at 118 → 118..538) but it looks rectangular-ish. It's low opacity at this moment. It's fine but the mask overlay creates banding. Let me reduce the scanline overlay opacity, and make halo rounder visually.

2. The whole composition: shapes cluster at center of SVG (y=160 within a 320 tall svg). Fine.

3. Readout "RX 11.083771" — too many decimals. Round it.

4. The shapes at bloom are small (62px at scale 0.42 in a 560x320 svg). At full scale 1 they're 62px, orbit radius 96 → looks decent. Let me screenshot at t=2.7 to check.

Let me pause and screenshot mid-loop. I'll use the browser tool: click Pause then... I can't set time via console in the browser tool. But playwright can. Let me use playwright screenshots at several times.

Let me look at frames 0, 1.6, 2.7, 4.6.

Let me view a few frames.

Nice ring of circles. Composition is centered horizontally but sits a bit high-ish? It's centered as a column (stage flex). Looks decent.

Issues:
1. RX readout too many decimals — round.
2. The dot row drifts (xPercent 6) making it off-center relative to track — that's fine, subtle.
3. The halo smear is visible as a blurry column; at t=2.7 it's a soft glow — acceptable but the vertical banding from the scanline overlay looks like a rectangle. Let me reduce the scanline overlay (body::after) opacity/mask, or remove it. It creates visible rectangular edges. I'll lower opacity to .35 and use a smaller mask radius... Actually the rectangular appearance comes from the mask-image radial-gradient on a fixed overlay — should be round. The visible "column" is the halo blur with filter blur(6px) on a 420px circle → looks soft. The banding is the scanlines over the halo making it appear as a square-ish patch. I'll reduce scanline opacity to 0.25 and increase grid spacing.

4. The composition could be a bit bigger/more centered vertically. The stage is centered via place-items:center on body grid, so it's centered. Fine.

Let me also check frame 0 (start composition) and 1.6.

The start composition is a tight cluster — quite small. It reads fine as "seed" but maybe make home cluster slightly larger (scale 0.55) and add a bit more spread so it's clearly visible. Also the halo glow banding is visible as a rectangular patch (the scanline overlay + halo). Let me:
- reduce scanline overlay opacity and make it finer,
- round the rx readout,
- bump home scale to 0.5 and HOME_R to 22 for a more visible start cluster.

Also the composition sits slightly high in the viewport (shapes center at y≈310 of 800). It's fine — the whole stage is centered.

Let me make these tweaks and re-verify the seam (changing home values is fine since gsap.set defines them).

Now re-run the verification (seam, pause/resume, restart, growth) and re-shoot frames.

Also note LOOP variable is now unused — harmless but let me remove it to keep clean. Actually it's declared and unused; fine, but I'll remove.

All good. Duration 5.06s (in 3–6 range), seam delta 0, pause freezes, resume continues, restart → t=0 with home values, tween counts constant (3 per shape, 5 per dot, 1 halo = stable), no console errors.

Now visual check of updated start frame and mid frames, plus a motion check in the browser tool.

Let me look at f_0.png and f_1.6.png.

Start composition is a visible tight cluster of rounded squares. Good.

The halo still shows as a soft blob (fine, it reads as glow). The composition sits centered; the vertical gap between shapes and dots is large (SVG is 320 tall with shapes in the middle, dots below). Could tighten by reducing svg height to 300 or moving dots up. Minor aesthetic — I'll reduce the svg height a bit by using viewBox 0 0 560 320 but CSS height 260? That would scale. Better: reduce gap to 14px and set svg height 300 (crop bottom empty space). Actually shapes orbit center y=160, orbit y-radius ~71 → shapes span 89..231 plus size. Bottom area 231..320 is empty → that's the gap. Set viewBox "0 0 560 260" and CY=130? Then rect y = 130-31=99. Let me just change the viewBox to "0 40 560 240" (crop) — that keeps coordinates and reduces empty space. Height CSS 240.

Let me do: viewBox="0 45 560 230", width 560 height 230. Shapes span y 89..231 → within 45..275 ✓. Halo top:118px is relative to stage; adjust to ~60.

Let me apply and re-screenshot.

Also the gap between svg and dots: stage gap 22px; plus dots row height. Let me reduce gap to 14 and check.

Also update the halo vertical position to sit behind the shapes: shapes center is at y = (160-46)/228 * 236 ≈ 118px from svg top. Halo 420px tall centered on that: top = 118 - 210 = -92 relative to svg; but halo is positioned relative to .stage, whose top is the svg top (halo is first child but absolutely positioned). So top: -92px. Hmm, currently top:64 → halo center at 64+210=274 → below shapes. Let me set top:-90px. But negative top on the first element in a flex column is fine (absolute).

Let me set top:-90px and gap 16px.

Wait, the halo is positioned relative to .stage, and .stage's first child is the halo (absolute, so it doesn't affect layout). The stage top = top of the svg (since halo is absolute). So svg top = stage top. Shapes center ≈ 118px below svg top. Halo center = top + 210. For center at 118 → top = -92. ✓

Re-shoot and verify.

Now check the browser tool for a live motion pass and a screenshot of the updated layout.

The layout is tighter now. The halo glow is a bit of a rectangular-ish blob (visible banding from the scanline overlay interacting with the halo). It's acceptable but the halo edge appears as a soft square. Let me check: halo is border-radius 50% with radial-gradient background and blur — it should be round. The visible artifact is the mask on body::after (radial 58% at 50% 45%) creating a rounded-rect-ish boundary over the glow. The banding at y≈455 is the mask edge. I'll just drop the scanline overlay to avoid the artifact, or reduce opacity to .22 and enlarge mask. Let me remove the scanline overlay entirely — cleaner. Actually a subtle texture is nice; I'll keep but make it much fainter (opacity .25) and mask radius 78% so the edge is far out and soft.

Also the halo appears as a vertical column because the shapes svg has overflow visible... no, it's the glow. Let me reduce halo blur and size to 360 and keep opacity moderate.

Let me do a motion check too.

Halo center should be at ~118px from svg top: top = 118 - 180 = -62 ✓.

Now check motion in browser tool (frames over time) to verify smooth loop.

Looks great. Loops counter increments (3 loops) while TWEENS stays 9 → no instance growth. Motion frames show smooth bloom and staggered dots.

One thing: the halo still shows a faint rectangular boundary at the top (y~200) — that's the mask edge of body::after, now much fainter. Acceptable.

Now final check: click Pause then Resume then Restart via the browser tool to confirm UI behavior interactively.

The click didn't pause — the DOM still says PLAYING and the button says "Pause". The click may have hit the wrong element (coordinates?), or the click landed and then... The reported T is 1.61 and state playing. Hmm, the click text "Pause" might have matched the readout? Let me click by coordinates on the button (429, 579).

Paused at T 1.06, label "Resume", state PAUSED, composition frozen. Now click Resume and verify time advances from 1.06, then Restart.

The text-based click reported still PAUSED — likely the text click matched the readout text or the click happened but the snapshot was taken at the same instant (T 1.06 unchanged, state PAUSED). Since the DOM still says PAUSED and button says "Resume", the click didn't register on the button (text matching probably hit the state pill "PAUSED"? no...). Let me click by coordinates on the Resume button (429, 579) again.

Resume worked: state PLAYING, T continues from 1.06 → 1.08/1.11 (not from 0). 

Now click Restart (557, 579) and confirm time returns to ~0 with cluster composition.

Restart works: T 0.03, cluster composition, rx ~8.9, progress bar reset, tweens still 9.

Note LOOPS jumped from 5 to 7 — restart with repeat:-1 triggers onRepeat when rewinding? GSAP's restart() calls... it may fire onRepeat. Minor cosmetic; loops counter isn't a required feature. I could suppress counting on restart by resetting loops=0 on restart instead. Let me make the counter meaningful: on restart, set loops = 0. Also, restart() firing onRepeat increments it. I'll reset loops to 0 in the restart handler after restart.

Let me do that small fix, then final verify + confirm file.

Also final check: the readout shows "TWEENS 9" which is a debug metric; keep it, it's informative and demonstrates no growth. Fine.

Let me apply the loops reset and run final verification.

Also paint() is called after restart in the handler, so the loop display updates. But paint() is called in the click handler after sync() — yes.

Final verification run.

All checks pass. No external URLs (0 matches for "http"). Single local script tag.

Final reload in the browser tool to confirm the last edit didn't break anything.

Everything works. Done. Write brief report.