Möbius strip animation

This isn’t much, but the idea popped into my head to make a Möbius strip animation. It shows a chrome ball traveling along the one side of a Möbius strip. I reckon I should make something that takes some effort now (and not an animation) %|
http://gallery.mudpuddle.co.nz/albums/public/mobius.avi
divx5.2, 164 kb