Fireworks · deepseek-v4-flash-0731
Create a fireworks display on a full-screen canvas where clicks launch shells that explode into gravity-affected, fading particle bursts.
transcript · 14 messages
Create a fireworks display on a full-screen canvas where clicks launch shells that explode into gravity-affected, fading particle bursts.
thinking
The user wants a fireworks display on a full-screen canvas. Let me build a single self-contained index.html file. Let me create a nice fireworks app: - Full-screen canvas - Clicks launch shells that explode into particle bursts - Gravity-affected, fading particles - Also auto-launch fireworks periodically Let me write the file.
/workspace/index.html (8289 bytes)Successfully wrote 8289 bytes to /workspace/index.html
thinking
Let me quickly verify the file loads without obvious JS errors by checking syntax with node.
Let me verify the JavaScript has no syntax errors.
{"command":"cd /workspace && node -e \"\nconst fs=require('fs');\nconst html=fs.readFileSync('index.html','utf8');\nconst m=html.match(/<scrJS syntax OK, size: 8289 bytes
thinking
The syntax is OK. There's a leftover unused `frame`/`origFrame`/`MAX_AUTO` variable but it doesn't matter functionally. Actually let me clean up the dead code a bit. Let me remove unused `frame`, `origFrame`, and `running`, and `MAX_AUTO`. Actually the autoTimer uses `18 + Math.random()*40`, MAX_AUTO unused. Let me clean up to keep it tidy.
The syntax is valid. Let me clean up a few unused/dead code fragments left in the script.
{"path":"/workspace/index.html","edits":[{"oldText":" const GRAVITY = 0.06; // downward acceleration per frame\n const DRAG = 0.985; Successfully replaced 3 block(s) in /workspace/index.html.
thinking
There's still a `frame` function defined after `draw()`. Let me check - I removed `frame` reference earlier? No, the regex I used to remove the smartFrame block included the "integrate auto" comment but the original `frame` function defined after draw() still exists. Let me check the file.
{"command":"cd /workspace && grep -n \"function frame\" index.html"}229: function frame() {
thinking
There's still a dead `frame` function I created earlier. Let me remove it.
{"path":"/workspace/index.html","edits":[{"oldText":" ctx.globalAlpha = 1;\n ctx.globalCompositeOperation = 'source-over';\n }\n\n fSuccessfully replaced 1 block(s) in /workspace/index.html.
{"command":"cd /workspace && node -e \"\nconst fs=require('fs');\nconst html=fs.readFileSync('index.html','utf8');\nconst m=html.match(/<scrJS syntax OK, final size: 8031 bytes -rw-r--r-- 1 node node 8031 Aug 1 05:17 index.html
Done. I built the fireworks display as a single self-contained `index.html` in `/workspace` with no external resources. **What it does:** - **Full-screen canvas** that adapts to the window size (with devicePixelRatio scaling for crisp rendering on high-DPI screens) - **Click to launch** — a shell rises from your click point and detonates above it, mid-air - **Gravity & fading** — particles are pulled downward with acceleration, damped by drag, and fade out over their lifetime; the additive (`lighter`) composite mode with a translucent fade layer creates glowing motion trails - **Varied bursts** — 6 color palettes, random particle counts, and occasional ring-shaped bursts; some particles render with a soft halo for extra sparkle - **Trail effects** — rising shells drop a glowing, tapering trail that fades - **Auto fireworks** — every few seconds it launches bursts (occasionally as double-bursts) so the screen stays lively even without clicks - A subtle hint bar at the bottom, crosshair cursor, and proper `resize` handling The JS is verified to parse cleanly, and everything (CSS in `<style>`, JS in `<script>`) is inlined into the one file — no network or CDN dependencies, so it runs fully sandboxed. Open `index.html` in any browser to try it.
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
EVALUATION
Fireworks auto-launch and explode into colorful gravity-affected particle bursts; clicks trigger extra shells convincingly.
Vision grade · anthropic/claude-sonnet-5
MEASUREMENTS
Raw readings from the capture, not a verdict — the grade above is the only judgement. Percentages are how much of the screen changed; the measure under-reports sparse motion on a dark background.