cool! (how did i miss this! (thanks Paul!)

i don't know the math-- but i used to make spirograph designs (using a compass) when i was a kid.. and then make color wheels.
(spin them fast enough and the paper looks white)

i also had a spirograph toy a large toothed, circle, with smaller 'gears' that you placed a pen in, and ran round the inner diameter of the large circle..

i am going to have fun making designs (and maybe learning some of the math!) with this aplet.

my other obsession