http://demonstrations.wolfram.com/Whi...
The Wolfram Demonstrations Project contains thousands of free interactive visualizations, with new entries added daily.
A bicycle leaves a pair of tracks in a mud patch with its front and rear tires. Because the track colors and direction in which the bicycle is traveling get shuffled with every track generation, this Demonstration can serve as a puzzle. Deselect the "sh...
Contributed by: Borut Levart
Audio created with WolframTones:
http://tones.wolfram.com