019 Boids Lagoon
Boids Lagoon: A school of 200 fish following boids rules (separation, alignment, cohesion) in a teal lagoon, drawn as small tapered shapes that flex as they…
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1 test · 8 finished runs (0 agent, 8 raw one-shot) · 8 live demos
The prompt
Boids Lagoon: A school of 200 fish following boids rules (separation, alignment, cohesion) in a teal lagoon, drawn as small tapered shapes that flex as they turn. Moving the mouse introduces a predator they flee from; sliders tune the three weights and a counter shows the FPS. Build it as ONE self-contained HTML file: inline CSS and JavaScript only, no libraries or frameworks, and no external requests of any kind (no CDNs, web fonts, images or audio files); anything visual or audible is made in code (HTML/CSS, SVG, Canvas, WebGL or WebAudio). It must work when opened directly from disk, fit the browser window responsively, and run without console errors. Output ONLY the complete HTML file, starting with <!DOCTYPE html> and ending with </html>, with no explanation or markdown fences.
Same prompt, all models: step through 8 runsIn the gallery: one player, arrow keys or swipe.
Live demo
Live demo
Live demo
Live demoDeepSeek V4 Pro
Raw API (one-shot)
raw API baseline
The model's code errors on load: Cannot access 'fish' before initialization
Live demo
Live demo
Live demo
Live demoQwen3.8 27B
Raw API (one-shot)
raw API baseline
The model's code errors on load: Invalid or unexpected token