Keywords: Irrational epitrochoid.gif Evolution of a spirograph pattern based upon a hypotrochoid with an inner radius of 10 an outer radius of PI-2 and a distance from the centre of the circle of 3 The x and y axes both start at -20 and end at 20 own 2009-07-16 SimsContPics Public domain Spirograph Animated GIF Animations on black background Animations of curves |