How can I make objects flash infinitely in slide show?
There is no automatic easy way to do this. There is a hack that will get you this effect if you really want it. Make a group of objects that flash once, and then pile on top of it more copies of the same object, each set to flash once. Set a few seconds delay between each effect, so that it won’t all happen to fast. It’s not great, but it’s the closest you’ll get to that “game show” feeling.