Good point SLB. hadn't thought about it. That's probably why my game(using that code) always suddenly slows up. I put a debuglog on the ticks, and they suddenly shoot up to one-hundred. I've desided to go over my code and switch everything to the variable-coefficient method. Thankfully, my game is in it's beggining stages at 670 lines. Should probably have blitzcoder correct the article. Anyway, thanks for bringing this topic up, as it has solved one of my games bugs.