if you are talking about setting a random frame you can use something like: Every 1 second set frame to random(0,highestframenumber)
If you're talking about playing a random animation you can call your animations "Anim1" "Anim2" etc and then do set animation to "anim"&random(1,5)
Thank you very much. Can you show me how to make the animotions disappear one by one while drawing (not the "frame"). I'm making a game like Google Doodle Halloween.