Nevermind.. I figured it out.
how did you do it?
made a button, then duplicated the page/state.
so you have two pages, start and end.
change the button to 0% transparency at the end state.
smooth the fade out in the timeline.
sellect fade and in the bottom right, under "common" you want to click on the "repeat" check box.
then click on "forever.
play and launch.
this is the tutorial i used.
hope it helps!