Originally posted by kbrown I'm not really sure what exactly are you trying to do here? Since you don't have any looping going on in your code I got to ask are you really trying to create a script or an expression? Can you try to explain your problem in bit more detail, please? Sure. What I am trying to do is have a piece of geometry instance itself over time. That is where the "rate of fire" vaiable comes in. I would like to make something like a partcle generator but geometry instead. I know I could just use a partcile emiter and make it instance my geometry but I want it to be rigid bodies. If you could think of a better way to do this that would rock.