Instructor: When I click on this box, it goes right, left, down, up. If I click again, nothing happened. Also, I can't interrupt it and tell it to stop the animation.
First, I'm going to configure my timeline to repeat infinitely. I do that by saying repeat is -1. If I click now, you'll see it'll continue going around and around.
Inside of my click handler, I can check when I click if timeline. is active. If it is active, I can say timeline.pause. If it's not active, I'll say timeline.resume. When I click, it'll start going and continue forever. I'll click and pause it and click and resume it.
This current setup is possible because we start paused and we only resume when we click and it's inactive. Once it is active, we go back to that pause state. We're toggling between resuming and pausing, checking to see if the timeline is active.