Pausing a movie clip when a mouse goes over it

Okay, so there is a movie on the timeline, and at the end of it there is an action frame that stops the movie so it doesn’t loop.

However, the last frame on another layer is also a movie clip, of a rotating circle. This rotating circle has buttons on it that will load other parts of the site. I want the circle to stop rotating whenever someone puts their mouse over it.

How can this be accomplished?

Please keep answers simple, precise, and easy to understand. I’m an artist and I don’t know code very well.