Can someone please help. I am having a bit of a memory loss!!

I'm running FCP 5. What i'm wanting to do is show a clip then show it 4 times on screen, then 16 times so it boxes into the frames automatically. It's for a music video. I know there is a button/menu somewhere to do this as i've done it before, I know it's staring me in the face but I just can't seem to find it again.
Can anyone help please, I'd like to get this finished today and i've been looking for the last hour.

I've no doubt i'll post this then find it, but if not any suggestions gratefully received.

Thanks, Carl

I was right just after posting I found it "Replicate" filter!