One at a time?

I have a series of movie clips (12 of them, not sequentially numbered but I guess they certainly could be). When you click one it advances it’s timeline to a midpoint and stops. If you click it again it continues that MC’s timeline which then resets itself to the first frame.

Now, what I need to do is set it up so that when one has already been clicked (is at the midpoint in it’s timeline and a second one is clicked, the original one fishes the sequence and resets itself and the newly clicked one runs to it’s midpoint.

I had set up an if/else statement but it seemed to me that what I actually needed was something like an “if/or”. Is there such a thing or is there a better way to do what I need to do here?