Too much Yoga? There's a speed control that comes up when you RUN it. The higher the number, the slower (the number of times it executes an empty loop). You could reprogram it to make it execute faster or with different patterns. But what for?By the way Harry I downloaded your Bounce.pgm but cannot control the speed of the bounce or the way it bounces. Is there any way to do so?Harry Binswanger hb@xxxxxxxx