Each of a thousand of turtles is drawing a line in a pompon. Turtles are described by a model class, which defines a handling function for the "step" signal. This function does the step forward with a small, random change of the heading and the step length.
The program creates 1000 turtles, but you can increase the number to the maximum your CPU can handle.

Take a look at the following features illustrated in the code: