Hi, I need some help with repeating an animation sequence several times within a scene.

What i have is an 'atom' that i've modelled using nurb sphere's. i have created a bunch of electrons and attached them to nurb circles as motion paths.

So i have my animation of the electrons making one full revolution over 30 frames.

But what i'm having trouble with is that i want this 30 frame animation to repeat over and over, so that the atoms can be in say a 300 frame movie in which i zoom in and out etc and the electrons continually revolve around the nuclei.

If anyone can help me out that would be great