Hi Rosemary,
Sorry for the problem with my Drop Box link. Also, thank you to Lin for helping out. I was having difficulty in attaching files on this board so I used the Drop Box link to my sorrow.
I have created a transition (attached) that might meet your requirements. It works as intended except when transitioning to a blank slide. This shortcoming can be worked around by including a black rectangle in the final slide. Anyone have any ideas as to why the transition fails to the blank slide?
Attached is a short clip showing the transition and the problem.
Star Out Trans.mp4
Star Out.pteeff