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Animated loader · kimi-k3.1-pro

Output generated Cost / run $0.1656 Runtime 260.7s

Prompt for this run

Build a looping loading animation using the provided GSAP library. Use HTML, CSS, and JavaScript as needed. Write it to `index.html` in the current working directory using your file tools. Inline your own CSS and JavaScript. Do not use external assets, CDNs, or network requests. Use the provided `gsap.min.js` (global `gsap`) through a plain local script tag; the runner will inline it into the final artifact. Required behavior: - On a dark background, show a group of rounded geometric shapes that smoothly change scale, position, and corner radius, plus a row of five dots with staggered motion or opacity. - Coordinate both elements using a GSAP timeline with smooth easing. The full sequence lasts 3 to 6 seconds and repeats without an abrupt jump or a growing number of animation instances. - Provide Pause/Resume and Restart controls. Pause freezes the current timeline position; Resume continues from it; Restart returns to the beginning. - Center the composition and keep it visible at the supplied viewport. Use HTML/CSS or inline SVG; no external assets or paid GSAP plugins are available. - Choose the palette and detailed choreography freely. No backend loading operation is required. Verify: Sample the timeline at several moments to inspect shape changes, staggered dot motion, and smooth transitions. Pause and resume to check that animation continues from the paused state, then use Restart and check the starting composition.

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TAKE IT TO CODE

A single self-contained HTML file — copy it and open in any browser, or reuse the prompt with your own pi-agent run.

RUN

modelkimi-k3.1-pro
vendorMoonshot · Kimi
harnesspi 0.87.1 · browser iteration
generated2026-10-24

METRICS

runtime260.7s
tokens in130k
tokens out7.3k
cached93k
cost / run$0.1656
Transcript · 28 messages
system

user

Build a looping loading animation using the provided GSAP library. Use HTML, CSS, and JavaScript as needed. Write it to `index.html` in the current working directory using your file tools. Inline your own CSS and JavaScript. Do not use external assets, CDNs, or network requests. Use the provided `gsap.min.js` (global `gsap`) through a plain local script tag; the runner will inline it into the final artifact. Required behavior: - On a dark background, show a group of rounded geometric shapes that smoothly change scale, position, and corner radius, plus a row of five dots with staggered motion or opacity. - Coordinate both elements using a GSAP timeline with smooth easing. The full sequence lasts 3 to 6 seconds and repeats without an abrupt jump or a growing number of animation instances. - Provide Pause/Resume and Restart controls. Pause freezes the current timeline position; Resume continues from it; Restart returns to the beginning. - Center the composition and keep it visible at the supplied viewport. Use HTML/CSS or inline SVG; no external assets or paid GSAP plugins are available. - Choose the palette and detailed choreography freely. No backend loading operation is required. Verify: Sample the timeline at several moments to inspect shape changes, staggered dot motion, and smooth transitions. Pause and resume to check that animation continues from the paused state, then use Restart and check the starting composition.

assistant
thinking
I need build. Should inspect files.
→ bash {"command":"ls -la && ls -lh gsap.min.js","timeout":10}
toolResult

total 84 drwx------ 3 node node 4096 Oct 24 01:47 . drwxrwxrwt 8 root root 4096 Oct 24 01:47 .. drwxr-xr-x 3 node node 4096 Oct 24 01:47 .home -rw-r--r-- 1 node node 72214 Oct 24 01:47 gsap.min.js -rw-r--r-- 1 node node 71K Oct 24 01:47 gsap.min.js

assistant
thinking
I'll create polished animation self contained except gsap script. I should think design. User asks looping loading animation dark, rounded geometric shapes smoothly scale pos radius and five dots. Coordinated timeline 3-6 sec repeat seamless, controls. Should verify sampling. I can implement 4.8 sec master timeline repeat -1 with morphing shape elements. Should have no abrupt jump and no growing instances. One timeline constructed. CSS visual. Center composition in viewport. Polished perhaps dark warm/purple, panel, loading interface. Shapes four squares/pills/orbs arranged around ring, dynamic geometric group. Row dots staggered. Controls accessible.

Should use GSAP. Timeline defaults power2.inOut, duration 4.8. Choreography symmetric start/end identical. Shapes initial positions perhaps coordinates relative center. Each shape absolutely at 0,0 with x/y, width etc. GSAP transforms scale x y rotation. borderRadius tween. Could use 4 shapes at positions in diamond, each 48px. Want visible rounded geometric group. Perhaps use 3 primary shapes? Group 4 shapes around center orb? CSS glows. I can create four "morphs" all identical 58x58 initial corners (positions -84,0 etc) morph into rectangular arc arrangement. GSAP timeline labels and .to with at positions.

Should guarantee final matches initial at 4.8. Use timeline sequence 0,1.2,2.4,3.6,4.8? Full 4.8. Start initial: positions four corners? At t=0 shapes square-ish at cardinal positions. At t1.2 they converge into central 2x2? At t2.4 orbit diamond rotate. At t3.6 elongated bars? Return 4.8. Dots staggered sinusoidal throughout, timeline loops. Dot tweens should start and end same transforms/opacities. I can use keyframes in .to? Each dot timeline repeat? Requirement both coordinated by timeline. Use master with each dot 2 cycles within 4.8. yoyo tweens? For each dot, .to(dot,{y:-12,opacity:1,scale:1.25,duration:.6}, offset) .to back duration .6 etc. 4 cycles perhaps. At t=0 initial opacity .35 scale .8 y0. Each dot completes 4 wave cycles at offsets? Should have full timeline end all start state. Use for each dot: for cycle=0..3: start = cycle*1.2 + i*.1? Last could exceed 4.8. Better wave cycles 2, each 2.4 with per-dot offset within cycle; 2.4 period, stagger .12, 5 dots total span .48. Start at i*.12 + cycle*2.4, up duration .6, down .6, hold remainder. Last ends at 2.4+ .48+1.2=4.08 leaving. All initial at cycle 0; at 2.4 some mid animation, but timeline only loop at 4.8 all done. Great. Dots motion throughout but pauses at portions. Could use 4 cycles every 1.2 and last end 4.68. At t=4.8 all initial. Each dot .to up .35 at c*1.2+i*.09 then .to down .55. Smooth sine.inOut. Dot active color via backgroundColor? Keep constant purple; opacity, boxShadow tween perhaps can be expensive but fine. Use scale/y. At time 0 first dot starts moving immediately. Good.

Master shapes: Use gsap.set initial via CSS and explicit timeline .to. GSAP .to with start values CSS transform? CSS left50 top50 and margin negative width/2; x y. Define CSS initial with -- perhaps use gsap.set. Should have Restart returns exact. tl.restart() sets time 0 and renders starting values; yes. Pause control toggling paused. Restart should restart playing? Requirement returns beginning likely play. Set pause button text Pause and tl.restart(). Include aria pressed? Use button pause with label and icon. Space perhaps keyboard optional. Progress ring? Not required. Can add small status. Keep concise, no overly elaborate irrelevant. Nice composition with "LOADING" text and dynamic percentage? Avoid progress semantics because endless. Add eyebrow "PLEASE WAIT" and "Composing the next frame" etc perhaps not needed. User specifically animation. Can include label "LOADING" and subtle "Preparing your experience". Control card.

Perhaps background subtle grid using CSS gradients no assets. Add decorative radial glows. Center stage 390x300. Morphs group inside. Center perhaps central small circle core pulses via same timeline (additional shape). Required group. Four shapes colored. I can use each shape gradient colors. Shape positions initial:
shape 0 x:-84 y:-52 width 58 height58 borderRadius18 rotation:-12
shape1 x:84 y:-52 ...
shape2 x:84 y:52
shape3 x:-84 y:52
Would form 2x2 separated rectangles. At 1.2 positions x:-30 y:-30 etc, scale .72, borderRadius 50%, rotate 45? At 2.4 diamond cardinal x0 y-80 etc, scaleX1.25 scaleY.65 borderRadius "50% 50% 18% 50%"? Border radius strings GSAP complex interpolation perhaps supported but avoid. Tween borderRadius numeric px values consistent. Use borderRadius 30 etc. Rotation. At 3.6 shapes align horizontal row? positions -90,-30,30,90 y0, scaleX .6 scaleY1.35, radius 14. At 4.8 return original. Full group rotation? Parent rotate can tween from 0 to 360 perhaps visual smooth but final equivalent; starting composition screenshot exact orientation same. However nested rotations okay. Could rotate group 0 ->90->180->270->360. At loop matrix may cause 360 reset to0 but visually same no abrupt. Yet restart start same. GSAP repeat -1 rotation 360 to 0 no visible jump because exact orientation. Fine. But shape individual rotation values also could spin. Simpler no parent rotate; group transforms coordinated. Each shape keyframe .to at absolute positions. All four .to simultaneously with variations. Add central core scale opacity pulse returns. Include orbital circle ring rotating? Could CSS animate independently violates both? Not necessary. Use SVG ring static with dashed stroke and opacity.

Should timeline duration 4.8. Build via gsap.timeline({repeat:-1, defaults...}); add labels. Shape tween segments duration1.2 each. Set transformOrigin center. GSAP set shape initial values in array. Build at positions:
initial array as above, shape sizes 62 perhaps.
At 1.2: inner 30 and all circles, scale .82, rotate +45.
At2.4 cardinal radius 82, scaleX1.15 scaleY.72 borderRadius20, rotation i*90 +90? At 3.6 row x(-96,-32,32,96), y0, scaleX .58 scaleY1.25, radius12, rotation0. At 4.8 initial.
Color perhaps background CSS static. Can animate background? not required. Dots row under. Ring perhaps rotates group static no.

Potential timeline .to with transform scaleX and scaleY while prior scale property? Set scale:1 then scaleX etc okay. GSAP when tween scaleX+scaleY independent. Border radius px.

No growing instances: one master no nested repeating; pause no new. restart tl.restart. Could include reduced motion: if prefers reduced motion, default paused? User expects looping. Perhaps don't disable. Pause accessible.

Should sample using browser. Could expose timeline for verification as window.loadingTimeline = master? Fine for inspect. Browser inspect likely DOM. I can set data attrs? Not needed. Perhaps helpful window.__loader = {timeline}. Should have no dev pollution? okay.

Should create.
→ write index.html (11250 bytes)
toolResult

Successfully wrote to index.html

assistant
assistant
thinking
Should check timeline core conflict weird final .to core at4.799 duration1.2 makes duration 5.999! Oops core sequence at0,1.2,2.4,3.6 each duration1.2 ends4.8 initial values at3.6 scale1.35 opacity.9 not initial. Added .to at4.799 extends to5.999, addLabel at4.8 doesn't shorten. I'll fix core pulses via keyframe segments at 0,.6 etc or .to at4.8? I need end initial at4.8. At sequence core values:
at0 scale1.35 opacity.9 duration1.2
at1.2 scale.65 .35
at2.4 scale1.35 .9
at3.6 scale1 opacity.65 duration1.2 return. That's good only four steps not alternating generic. Replace forEach config list. No extra. Dots last at cycle3 start3.6+.36=3.96 up end4.3 down end4.86 -> exceeds 4.8 for i4: .36+ .9 =4.86. Full master 4.86. Still within 3-6 but end at4.86 initial yes all complete, but addLabel4.8 before actual end; duration actual4.86. Could shorten down to .50 gives last end4.8 exactly. Four cycles each1.2. Last start3.96+ .34+.5=4.8. Great. Should timeline exactly4.8. Core fix. Also potential rotations at loop initial +360 -> initial -12 etc visual exact. Fine. Should browser.
→ edit {"path":"index.html","edits":[{"oldText":" [0, 1.2, 2.4, 3.6].forEach((time, i) => {\n master.to(core, {\n scale: i % 2
toolResult

Successfully replaced 2 block(s) in index.html.

assistant
thinking
Should browser reload inspect screenshot.
→ browser {"action":"reload"}
toolResult

Frame 1, +0ms

[Browser image supplied to model]

{"console":[],"dom":"SHAPE SHIFT\n\nLoading your experience\n\nGood things are coming together.\n\nPause\nRestart","images":"attached"}

assistant
thinking
Looks good. Should sample several moments inspect using browser perhaps browser inspect returns only dom no JS eval. Could use Playwright through bash? Browser custom perhaps inspect no evaluate. I can use browser screenshots with pauses and motion. Should have sampling via browser screenshot moments perhaps motion. Browser motion outputs frames. Should pause resume verify. I can use browser click screenshot etc. To inspect values, perhaps browser inspect DOM only. Could run node with playwright installed? Check environment perhaps use browser tools easier. Click pause and screenshot compare timeline frozen via screenshots. Should have no time values accessible through tool except visual. Can inspect console perhaps. Browser motion.
→ browser {"action":"motion"}
toolResult

Frame 1, +0ms

[Browser image supplied to model]

Frame 2, +551ms

[Browser image supplied to model]

Frame 3, +1099ms

[Browser image supplied to model]

Frame 4, +1651ms

[Browser image supplied to model]

{"console":[],"dom":"SHAPE SHIFT\n\nLoading your experience\n\nGood things are coming together.\n\nPause\nRestart","images":"attached"}

assistant
assistant
thinking
Interesting first frame already changed and circles overlap in center, intended. Should pause. Click at600,610.
→ browser {"action":"click","x":600,"y":610}
toolResult

Frame 1, +0ms

[Browser image supplied to model]

{"console":[],"dom":"SHAPE SHIFT\n\nLoading your experience\n\nGood things are coming together.\n\nResume\nRestart","images":"attached"}

assistant
thinking
Pause at row nice. Should verify freeze by screenshot after perhaps motion while paused should same.
→ browser {"action":"motion"}
toolResult

Frame 1, +0ms

[Browser image supplied to model]

Frame 2, +548ms

[Browser image supplied to model]

Frame 3, +1087ms

[Browser image supplied to model]

Frame 4, +1625ms

[Browser image supplied to model]

{"console":[],"dom":"SHAPE SHIFT\n\nLoading your experience\n\nGood things are coming together.\n\nResume\nRestart","images":"attached"}

assistant
thinking
Frozen. Resume click then screenshot immediate perhaps changed and continue. Restart click check start composition. Could restart while paused? My restart plays. Requirement restart returns beginning. Yes. I should check.
→ browser {"action":"click","x":550,"y":610}
toolResult

Frame 1, +0ms

[Browser image supplied to model]

{"console":[],"dom":"SHAPE SHIFT\n\nLoading your experience\n\nGood things are coming together.\n\nPause\nRestart","images":"attached"}

assistant
thinking
Should have restart click coordinates662,610.
→ browser {"action":"click","x":663,"y":610}
toolResult

Frame 1, +0ms

[Browser image supplied to model]

{"console":[],"dom":"SHAPE SHIFT\n\nLoading your experience\n\nGood things are coming together.\n\nPause\nRestart","images":"attached"}

assistant
assistant
thinking
Looks good. Perhaps rigorous sample timeline via browser console not available. Could use chromium remote? browser inspect no eval. I can use playwright package perhaps installed. Check bash require.
→ bash {"command":"node -e \"for (const p of ['playwright','puppeteer']) { try { console.log(p, require.resolve(p)); } catch(e) {} }\"","timeout":1
toolResult

(no output)

assistant
thinking
Could use browser only enough. Should potential issue core at time0: adding tweens at0 after shapes doesn't change. Duration perhaps dots .5 exactly floating and label4.8. Good.

Could improve restart exact start screenshot yes. One issue initial composition in screenshot shape dimensions 58, positions; nice. Stage dots first raised on restart because screenshot immediate time ~.1, okay "returns to beginning". If precise check restart and immediately pause? User expects start. Master.restart plays. Fine.

Should verify loop smooth by screenshot around boundaries perhaps browser motion only1.6 secs. Could expose master to tool but not. Could perhaps browser action inspect text includes script variables no. I can run Chrome CLI? Check chromium path and remote debugging perhaps.
→ bash {"command":"which chromium chromium-browser google-chrome 2>/dev/null || true; grep -n \"master.to(core\\|duration: .50\\|loop-end\" index.h
toolResult

355: ].forEach((state, time) => master.to(core, state, time * 1.2)); 374: duration: .50, 381: master.addLabel('loop-end', 4.8);

assistant
thinking
Perhaps add keydown Space? Not necessary. Make sure no external requests. script local only. Good.

Potential issue CSS mask-image unsupported just no mask. Fine.

Potential requirement scale, position and corner radius shape. yes. five dots. yes. Timeline4.8. smooth. Controls. no extra instance. all good.

Perhaps actual GSAP initial render might have one core .to with scale1.35 etc. At end shape rotation348 etc vs -12 equivalent, dots all base. Smooth no jump. Core same. Good.

Check current animation after restart continues. screenshot enough.

Respond concise report checked and unverified. User asked verify sample several moments etc. I can state sampled motion frames at ~0,.55,1.1,1.65, saw morph and stagger. Paused, motion frames frozen, resumed, restart reset. No console errors. Remaining unverified perhaps long-run multi-loop resource use not measured. Should not overdo. Respond mentioning file.

Created `index.html` with: - A seamless **4.8-second GSAP timeline** coordinating four morphing geometric shapes and five staggered dots. - Smooth changes to position, scale, rotation, opacity, and corner radius. - Functional **Pause/Resume** and **Restart** controls. - Responsive, centered styling on a dark background with no external assets. Verified in the browser: - Sampled multiple animation frames to confirm shape morphing and staggered dot motion. - Pause freezes all elements; Resume continues from the paused state. - Restart restores the initial composition and resumes playback. - No console errors appeared. Long-duration resource usage across many loops was not measured.