Animated loader · gpt-5.6-terra
Output generated Cost / run $0.0556 Runtime 50.1s
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.
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
METRICS
Transcript · 21 messages
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.
thinking
**Assessing library existence** I need to check if the library we want to use actually exists. It's important to ensure it's there before we go ahead and build anything. If it's not available, I might need to consider alternatives or even think about creating it ourselves. Let's see what options are out there! I want to be thorough in my inspection to make sure we have everything we need.
{"command":"ls -l && find . -maxdepth 1 -type f -printf '%f\n'","timeout":10}total 72 -rw-r--r-- 1 node node 72214 Oct 14 07:58 gsap.min.js gsap.min.js
thinking
**Planning design and timeline** I need to write the file, focusing on the design and setting a timeline of 4.8 seconds, which will repeat. I'm thinking about using shapes transformed through GSAP with squared grouping. I'll need labels and buttons as well. Should I start with initial static values before setting the timeline? I might use seamless repeats with keyframes that could potentially yoyo. The timeline stages should return to the initial state. I’m also considering dot stagger bounces in two sequences during shape transforms. I'll get started on this!
index.html (6314 bytes)Successfully wrote to index.html
thinking
{"action":"reload","x":0,"y":0,"toX":0,"toY":0,"text":"","delta":0}Frame 1, +0ms
[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":"PREPARING YOUR SPACE\n\nPause\n↻\n\nAnimation running · 4.8 second loop","images":"attached"}
thinking
{"action":"motion","x":0,"y":0,"toX":0,"toY":0,"text":"","delta":0}Frame 1, +0ms
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Frame 2, +563ms
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Frame 3, +1120ms
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Frame 4, +1651ms
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{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"PREPARING YOUR SPACE\n\nPause\n↻\n\nAnimation running · 4.8 second loop","images":"attached"}
thinking
**Investigating interesting shapes** I'm focusing on interesting shapes that don't change until about 1.65. It seems the browser starts at an unknown point, which is intriguing. I want to have control, so I need to click the pause coordinate at 575, 570. Then, I might consider comparing the motion afterward. This will help me understand how these shapes behave and respond to different inputs.
{"action":"click","x":573,"y":570,"toX":0,"toY":0,"text":"","delta":0}Frame 1, +0ms
[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":"PREPARING YOUR SPACE\n\nResume\n↻\n\nAnimation paused","images":"attached"}
thinking
{"action":"motion","x":0,"y":0,"toX":0,"toY":0,"text":"","delta":0}Frame 1, +0ms
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Frame 2, +539ms
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Frame 3, +1076ms
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Frame 4, +1605ms
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{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"PREPARING YOUR SPACE\n\nResume\n↻\n\nAnimation paused","images":"attached"}
thinking
{"action":"click","x":574,"y":570,"toX":0,"toY":0,"text":"","delta":0}Frame 1, +0ms
[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":"PREPARING YOUR SPACE\n\nPause\n↻\n\nAnimation running · 4.8 second loop","images":"attached"}
{"action":"motion","x":0,"y":0,"toX":0,"toY":0,"text":"","delta":0}Frame 1, +0ms
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Frame 2, +575ms
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Frame 3, +1132ms
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Frame 4, +1741ms
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{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"PREPARING YOUR SPACE\n\nPause\n↻\n\nAnimation running · 4.8 second loop","images":"attached"}
thinking
{"action":"click","x":658,"y":570,"toX":0,"toY":0,"text":"","delta":0}Frame 1, +0ms
[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":"PREPARING YOUR SPACE\n\nPause\n↻\n\nAnimation running · 4.8 second loop","images":"attached"}
Implemented the self-contained GSAP loading animation in `index.html`. Verified in browser: - Initial centered dark-theme composition renders correctly. - Sampled multiple timeline moments: shapes change position, scale, rotation, and corner radii; dots animate with a staggered bounce/fade. - Pause freezes the animation state. - Resume continues from the paused position. - Restart returns to the starting composition and plays again. - Console showed no application errors (only the runner sandbox warning).