Trace II, Interactive Drawings by Thomas Petersen

Trace II is an interactive drawing. It is a playful game of indirect creativity originating somewhere between the actions of the user, the program and the artist. The user must navigate a simple set of rules to generate drawings by means of a group of semi-autonomous units moving around on the screen.
Trace II is created for full screen display on touch screen, but you can try an online version here: Trace II - Thomas Petersen