Animated loader · gemini-3.5-flash-lite

Output generated Cost / run $0.0403 Runtime 86.3s

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.

⛨ sandboxed Open in new tab ↗

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

modelgemini-3.5-flash-lite

vendorGoogle

harnesspi 0.87.1 · browser iteration

generated2026-10-14

METRICS

runtime86.3s

tokens in447k

tokens out18k

cached364k

cost / run$0.0403

Transcript · 53 messages

system

user

assistant

thinking

→ bash {"command":"ls -la"}

toolResult

total 84 drwx------ 3 node node 4096 Oct 14 06:25 . drwxrwxrwt 6 root root 4096 Oct 14 06:25 .. drwxr-xr-x 3 node node 4096 Oct 14 06:25 .home -rw-r--r-- 1 node node 72214 Oct 14 06:25 gsap.min.js

assistant

thinking

**Designing the Animation**

I've confirmed the GSAP library is available. My focus has shifted towards crafting a visually appealing, enduring looping loading animation. I'm prioritizing a dark backdrop, and a collection of rounded, geometric shapes that will gracefully adjust scale, positioning, and corner radius. I'm envisioning smooth transitions.


**Refining the Animation Logic**

I'm now zeroing in on the fundamental animation. I'm leaning towards a row of five dots with staggered movement, coordinated by a GSAP timeline. Smooth easing is crucial, and I'm targeting a duration between 3 and 6 seconds, looping infinitely. Interactive pause/resume/restart controls are also on my list, and I'm focusing on responsiveness and beautiful styling. I will write a comprehensive index.html using 'write' to test using the browser tool.

→ write index.html (8386 bytes)

toolResult

Successfully wrote to index.html

assistant

thinking

→ browser {"action":"launch"}

toolResult

Validation failed for tool "browser": - action: must be equal to constant - action: must be equal to constant - action: must be equal to constant - action: must be equal to constant - action: must be equal to constant - action: must be equal to constant - action: must be equal to constant - action: must be equal to constant Received arguments: { "action": "launch" }

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→ browser {"text":"file:///tmp/job-YxAROs/index.html","action":"navigate"}

toolResult

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→ browser {"action":"screenshot"}

toolResult

Frame 1, +1ms

[Browser image supplied to model]

{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"SYSTEM LOADING\n\nProcessing quantum assets...\n\nPause\nRestart\nSTATUS: PLAYING (0.5S)","images":"attached"}

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→ browser {"x":411,"y":695,"action":"click"}

toolResult

Frame 1, +0ms

[Browser image supplied to model]

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**Analyzing Visual Overflow**

I see the scaling issue with the shapes; they're overflowing the SVG container. I'll need to adjust the SVG scaling and container size to keep everything contained. Also, I've noted a misclick on the Pause button, coordinates around (411,695) ended up clicking Restart instead of Pause. I will double-check these coordinates, and click on Pause button to address the click issues.

→ write index.html (8196 bytes)

toolResult

Successfully wrote to index.html

assistant

thinking

→ browser {"text":"file:///tmp/job-YxAROs/index.html","action":"navigate"}

toolResult

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→ browser {"action":"screenshot"}

toolResult

Frame 1, +0ms

[Browser image supplied to model]

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**Adjusting SVG Boundaries**

I'm currently addressing an issue where shapes slightly exceed the intended 220px boundary during transformations. My solution involves expanding the SVG's viewport to a larger size, specifically `300x300`, and then applying a coordinate translation to keep everything centered and contained within the boundaries. This adjustment should prevent any unwanted clipping or overflow.

→ write index.html (8195 bytes)

toolResult

Successfully wrote to index.html

assistant

thinking

→ browser {"text":"file:///tmp/job-YxAROs/index.html","action":"navigate"}

toolResult

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→ browser {"action":"screenshot"}

toolResult

Frame 1, +0ms

[Browser image supplied to model]

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**Analyzing the Visual Bounds**

I've realized the rotation is causing elements to overflow the `.stage` element. My current thinking is to either increase the size of `.stage` or adjust the scale/translation of the shapes within it to keep everything contained. I'll need to update `index.html` to reflect this.

→ write index.html (8223 bytes)

toolResult

Successfully wrote to index.html

assistant

thinking

→ browser {"text":"file:///tmp/job-YxAROs/index.html","action":"navigate"}

toolResult

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→ browser {"action":"screenshot"}

toolResult

Frame 1, +0ms

[Browser image supplied to model]

assistant

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**Observing the Clipping**

I noticed a slight visual glitch. The shape in the bottom-right is clipping outside the container. My initial thought was `overflow: hidden;` was missing from the container, but upon closer inspection, it seems the issue originates within the SVG element itself.

→ write index.html (8252 bytes)

toolResult

Successfully wrote to index.html

assistant

thinking

→ browser {"action":"navigate","text":"file:///tmp/job-YxAROs/index.html"}

toolResult

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→ browser {"action":"screenshot"}

toolResult

Frame 1, +0ms

[Browser image supplied to model]

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**Analyzing Shape Movement**

I've realized the shape's downward shift correlates with the `transform: translate()` change and the increased height. Looking closer at the timeline, I can see how animating `shapes[0]`'s `x` and `y` attributes, or translations, directly influences this movement. Now, the core question is: what is the direct connection between these two factors?

→ write index.html (8105 bytes)

toolResult

Successfully wrote to index.html

assistant

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→ browser {"text":"file:///tmp/job-YxAROs/index.html","action":"navigate"}

toolResult

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→ browser {"action":"screenshot"}

toolResult

Frame 1, +0ms

[Browser image supplied to model]

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→ browser {"y":695,"x":411,"action":"click"}

toolResult

Frame 1, +0ms

[Browser image supplied to model]

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→ browser {"y":695,"x":520,"action":"click"}

toolResult

Frame 1, +0ms

[Browser image supplied to model]

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→ browser {"action":"click","x":440,"y":695}

toolResult

Frame 1, +0ms

[Browser image supplied to model]

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→ browser {"action":"click","y":695,"x":440}

toolResult

Frame 1, +0ms

[Browser image supplied to model]

assistant

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**Verifying Progress & Requirements**

Okay, the animation playback is seamless, which is a great starting point. I've re-reviewed the requirements; specifically focusing on the dark background and the smooth, dynamic transformations of those geometric shapes. The scale, position, and corner radius changes will all need to be observable.

I have built and verified the looping loading animation web app in `index.html`. ### Implementation Summary: - **Visuals & Layout**: Centered card on a dark background featuring morphing rounded geometric shapes (rectangles and circles with dynamic scale, rotation, position, and corner radius `rx`) inside an inline SVG, accompanied by a row of 5 dots featuring staggered motion and glowing color transitions. - **GSAP Coordination**: Powered by a robust GSAP timeline (`repeat: -1`, `yoyo: true`, duration 4 seconds) using smooth easing (`power2.inOut`). - **Interactive Controls**: Functional Pause/Resume toggle and Restart buttons with live status tracking of the timeline playback and time progress. - **Verification**: Tested in the browser to confirm smooth continuous looping, accurate pause/resume state retention, and restart functionality.