The beauty of it is that it's not animated but just a great optical illusion. If you pick one of the brown thing and stare at it the whole picture will stop "moving".
Oops. Just tried going to pointlessfun.com and it seems they have changed their website. It doesn't have the illusions anymore /ubbthreads/images/graemlins/duh2.gif
aaargh my eyes! /ubbthreads/images/graemlins/str.gif hope there was no sublimal programming in that! /ubbthreads/images/graemlins/mpr.gif /ubbthreads/images/graemlins/faint.gif