Ice Skating Rink
Skaters circle a frozen rink, carving glowing trails that are etched procedurally into a live data texture rather than any external image. Each pass darkens the ice along the skater's path, and the whole texture slowly fades back to bright white so old trails vanish over time.

• Up to 5 skaters, each on an independent radius/speed/wobble
• 512x512 DataTexture updated per-pixel each frame for trails
• Trail stamping via line-stepping between successive positions
• Continuous fade pass restores ice brightness over time
• 32 rim lights cycle warm/cool colors around the boards