Reverse Playbackwith AS 2.0

Yes I know this has been posted several times before but I am not bale to end up using those suggestions.

Basically I have a few simple animations that would look nice if I can play them in reverse

I have a few buttons that move as the user clicks on the
(User clicks: other buttons move to the side as the clicked button rises and scales up, I would like to reverse this process within a back button)

I have tried using a if else statement with the prevFrame option where AS goes back one frame until the play head gets back to the desired frame

I thought of being able to create a variable that loads the current frame number and goes back one frame at a time while the variable checks the frame number. Didn’t work. Anybody got any suggestions?