Help with animations after opening lightbox

Hi guys

Looking for some help on the slide I have sent you.  I have clickable shapes which opens up additional onscreen info.  This info fades in and out automatically with a voiceover on each layer.  The 2nd box has a button within it so I dont have the exit animation on it.  Click the button to go to the lightbox.  When I return, i would like the animation to then automatically fade out before clicking onto the next shape.  Tried variables with not much success and probably got it in a right old mess!  

Would appreciate someone solving the for me.

Thanks
Roz