a) how to loop a scene to go from the first frame to the last to the second last etc
WHILE
b) having the scene play either forwards or backwards (as above) while the user has their mouse over a button but making the scene pause when the users mouse isn’t over the button.
am I right in thinking that you want the movie is to play start to finish when it reaches the end it plays backwards, when it reaches the start it plays forwards again and so on? But this is only to play if the user has the mouse over a button?
if this is what you want then you can do it like this: