LoopOnQT theChannel, theMarker
This function loops back to a specified frame until the movie in channel specied is finished.  This is useful for animated menus and interfaces, where you want to keep things moving on the stage eventhough you are waiting for a sound to finish.
Example:  theMarker can be: any negative number, 0, or any frame label ("myLoop").  theChannel can be 1 through 48
loopOnQT(4,-4) -- channel 4;back four markers
loopOnQT(15,-1)   --channel 15;previous marker
loopOnQT(4,0)   --channel4;current marker
loopOnQT(12,"myLoop") --movie in channel 12 and loop to the marker named "myLoop"