Shooting spheres with a delay

I am making an animation of a building falling down after being hit by spheres. I want one set of spheres to fire at the start of the animation, and then another set after a certain amount of frames, etc.

How would I accomplish that?

That demo is rendered and programmed in C++. If you really want to do that you can…or you can use a delay sensor.

Okay… sorry about that. Can you give me some details on how to accomplish this though? What should the delay sensor trigger? ex. create object, make existing object start moving…

Well, just mess around with the time settings on the delay sensor until you make it come in at the right time. Connect that sensor to an and controller and that to an add object actuator, so on…