Like I Was 3 Years Old

1

i’ve ask this once before and never had a chance to try it out. I have MC on one of my pages and they are becoming a bit large in size. I want to load 3_MC one by one to make a one big loop of 3 different_MC. beside loading the file in an empty clip. What script best suites this problem and where wold i place it in the file / MC???