I'm new to MAYA. I'm creating an animation of objects floating up and fading. I've completed the animation, but was asked to loop it. Now, I understand that I need to have the first frame and last frame to be the same, but getting to that point is what's hanging me up. What's the best way to get there?

My animation has an object floating up every 5 frames and lasting 20m frames (fading about 18 frames in).

Thanks!