Stopping and starting with a button?

I have a simple tween that runs over 50 frames, there is no stop action so it loops, just what I want.

I have placed an invisible button over the tweened animation, now here’s my question:

Whe i click on the invisible button the animation stops and when I click on it again, it restarts

So that’s it really, can this be done? I know how to stop the animation by putting a stop in the action script, so I am looking for some actionscript that works on an alternative click method if I am making myself clear? Example:

First click stops it, second click starts it, third click stops it fourth click starts it - this goes on forever.

Thank you.