I did it the super-lazy way and just looped six frames from the clip (1 2 3 4 5 6 1 2 3 4 5 6...). If you don't like how they move forward quickly as the loop resets, I can do a zigzag loop (1 2 3 4 5 6 5 4 3 2 1 2 3....) or something. I can slow things down more if you want too.
edit: this is Raven_Freak's request, if anyone else was wondering.