None, really. Just.. press the green flag. :3 It repeats forever, so you don't have to press it each time it pauses for another ear flick.
By first I mean the first one to have more than three frames. xD I'm making a character now. It'll have blue ear tips, gray fur, and an orange paw. Not sure about the rest. And the song is Rottara Rottara by Buono. Anyway, it's /supposed/ to be an ear flick, but it looks more like it's ear is having a seizure. So.. enjoy? o__O'