Fireworks · gpt-5.4-nano
Create a fireworks display on a full-screen canvas where clicks launch shells that explode into gravity-affected, fading particle bursts.
transcript · 4 messages
Create a fireworks display on a full-screen canvas where clicks launch shells that explode into gravity-affected, fading particle bursts.
thinking
**Planning a canvas app** I'm writing an index.html for a full app using a canvas that covers the full screen. When the user clicks, I'll create shells that explode into particle bursts influenced by gravity. The shells will have velocity, fuse time, and particles will have radial velocities, gravity, drag, and colors. I also need to handle resizing the canvas, use requestAnimationFrame, and ensure no external libraries are involved. Visuals will be nice, utilizing devicePixelRatio for clarity. Let's outline the implementation details clearly!**Designing the particle explosion** I need to set conditions for when the particles should explode, like when the fuse is at zero or when the vertical position is below a certain threshold. Each explosion will create a random number of particles, utilizing a color palette in HSL. The particles will have radial velocities influenced by gravity, and their alpha will decay over time. For rendering, I need to ensure smooth trails by clearing with a slight alpha, likely using rgba for background adjustments. I'm planning to blend particles with a lighter composite operation, and I’ll make sure everything is full-screen. I’ll write index.html without separating any files and include a UI hint for user interaction. Let's get to crafting the code!
index.html (12681 bytes)Successfully wrote 12681 bytes to index.html
Created **index.html** with a full-screen canvas fireworks scene. Click/tap to launch upward shells that **explode into gravity-affected, fading particle bursts** (with glow, drift, and optional glitter sparks). Press **Space** for a larger show.
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 launch and explode into colorful gravity-affected particle bursts on click and Enter+Space, but arrows/WASD/drag/wheel do nothing.
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.