Matrix digital rain · muse-ember
Output generated Cost / run $0.0102 Runtime 43.1s
Prompt for this run
Build an animated Matrix-style digital rain effect on a full-screen black canvas. 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. No third-party libraries are provided. Required behavior: - Draw multiple independently moving columns of green katakana glyphs, each with a brighter leading character and a fading trail. - Vary column speed and start position. Recycle columns after they leave the bottom so the effect continues without accumulating off-screen state. - Provide Pause/Resume and Restart. Pause freezes the animation; Restart resets the columns and clears previous trails. - Resize the canvas and column layout to fit the viewport without stretching an old screenshot or leaving an uncovered strip. - Use locally available fonts and procedural drawing; no external fonts or images. Choose glyphs, brightness, and timing freely. Verify: Sample the animation at several moments to inspect independently moving columns, brighter leading glyphs, and fading trails. Pause and resume to check that the image freezes and continues, then use Restart and check that old trails are cleared.
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.
METRICS
Transcript · 27 messages
Build an animated Matrix-style digital rain effect on a full-screen black canvas. 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. No third-party libraries are provided. Required behavior: - Draw multiple independently moving columns of green katakana glyphs, each with a brighter leading character and a fading trail. - Vary column speed and start position. Recycle columns after they leave the bottom so the effect continues without accumulating off-screen state. - Provide Pause/Resume and Restart. Pause freezes the animation; Restart resets the columns and clears previous trails. - Resize the canvas and column layout to fit the viewport without stretching an old screenshot or leaving an uncovered strip. - Use locally available fonts and procedural drawing; no external fonts or images. Choose glyphs, brightness, and timing freely. Verify: Sample the animation at several moments to inspect independently moving columns, brighter leading glyphs, and fading trails. Pause and resume to check that the image freezes and continues, then use Restart and check that old trails are cleared.
thinking
Designing a single-page canvas app with animated columns, pause and restart controls, and responsive layout.Finalizing the fading overlay, resize handling, and device-pixel-ratio scaling for the animation.Switching to explicit trail history with opaque canvas clear and head glow for verification.
{"command":"pwd; ls -la"}/tmp/job-qjqaJR total 12 drwx------ 3 node node 4096 Nov 10 01:06 . drwxrwxrwt 8 root root 4096 Nov 10 01:06 .. drwxr-xr-x 3 node node 4096 Nov 10 01:06 .home
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index.html (8745 bytes)Successfully wrote to index.html
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{"action":"inspect"}Frame 1, +0ms
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{"console":[],"dom":"▓ MATRIX RAIN\n● LIVE\n⏸ Pause\n↻ Restart\nSPACE — pause / resume · R — restart","images":"attached"}
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{"path":"index.html","edits":[{"oldText":" return {\n x,\n y,\n speed,\n trailLen,\n trail: [], // [{roSuccessfully replaced 2 block(s) in index.html.
{"action":"screenshot"}Frame 1, +0ms
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{"console":[],"dom":"▓ MATRIX RAIN\n● LIVE\n⏸ Pause\n↻ Restart\nSPACE — pause / resume · R — restart","images":"attached"}
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{"action":"motion"}Frame 1, +0ms
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Frame 2, +556ms
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Frame 3, +1122ms
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Frame 4, +1684ms
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{"console":[],"dom":"▓ MATRIX RAIN\n● LIVE\n⏸ Pause\n↻ Restart\nSPACE — pause / resume · R — restart","images":"attached"}
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{"action":"click","x":308,"y":40}Frame 1, +0ms
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{"console":[],"dom":"▓ MATRIX RAIN\n❚❚ PAUSED\n▶ Resume\n↻ Restart\nSPACE — pause / resume · R — restart","images":"attached"}
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{"action":"motion"}Frame 1, +0ms
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Frame 2, +565ms
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Frame 3, +1136ms
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Frame 4, +1699ms
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{"console":[],"dom":"▓ MATRIX RAIN\n❚❚ PAUSED\n▶ Resume\n↻ Restart\nSPACE — pause / resume · R — restart","images":"attached"}
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{"action":"click","x":322,"y":40}Frame 1, +0ms
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{"console":[],"dom":"▓ MATRIX RAIN\n● LIVE\n⏸ Pause\n↻ Restart\nSPACE — pause / resume · R — restart","images":"attached"}
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{"action":"click","x":419,"y":40}Frame 1, +0ms
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{"console":[],"dom":"▓ MATRIX RAIN\n● LIVE\n⏸ Pause\n↻ Restart\nSPACE — pause / resume · R — restart","images":"attached"}
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{"action":"screenshot"}Frame 1, +0ms
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{"console":[],"dom":"▓ MATRIX RAIN\n● LIVE\n⏸ Pause\n↻ Restart\nSPACE — pause / resume · R — restart","images":"attached"}
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{"command":"ls -lh index.html; grep -c \"http\" index.html || true; grep -n \"addEventListener\" index.html"}-rw-r--r-- 1 node node 8.9K Nov 10 01:06 index.html 0 246: pauseBtn.addEventListener('click', () => setPaused(!paused)); 247: restartBtn.addEventListener('click', restart); 248: window.addEventListener('resize', resize); 249: window.addEventListener('keydown', (e) => {
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Created self-contained `index.html` (8.9 KB, no external resources/CDNs) with full-screen Matrix digital rain: - **Multiple independent columns** of green katakana glyphs (local monospace/MS Gothic fonts, procedural canvas drawing), each with randomized speed, trail length, glyphs, and start position. - **Brighter leading glyph** in white-green with glow, and a **fading trail** whose alpha increases toward the head. - **Recycling:** columns are reset with new speed/trail once head + trail fully leaves the bottom, dropping old state. - **Controls:** Pause/Resume button (also `Space`), Restart button (also `R`), LIVE/PAUSED status indicator. Restart clears the canvas and regenerates columns. - **Resize handling:** `window.resize` listener resizes canvas to the viewport (with DPR scaling), repaints solid black to avoid stretched leftovers/uncovered strips, and preserves/extends/trims the column grid. Verified in the browser: - Inspected initial frame and motion sequence — dense columns, independently moving speeds, fading trails, brighter heads visible. - Clicked **Pause**: status changed to `❚❚ PAUSED` / Resume, and a motion sequence showed identical frozen frames. - Clicked **Resume**: status returned to `● LIVE` and glyphs continued moving/changing. - Clicked **Restart**: old trails cleared (near-black frame with only fresh heads), followed by fully regenerated columns in a subsequent screenshot. - Console remained empty (no errors). Unverified: physical viewport resize (browser tool had no resize action; resize logic is implemented and code-reviewed), and very long-term recycling beyond the sampled motion sequence.