How to make 'dumb ways to die' puke clean up style game in AS2 ?

Hi all. I’ve been having some trouble while making simple erasing game. The game have system like ‘dumb ways to die’ puke clean up. with time to clear all bitmap data and 3 random image. any suggestion are accepted.

here’s the swf https://www.dropbox.com/s/9h5xbyy364z9ht6/coba%201.swf?dl=0
and the fla https://www.dropbox.com/s/fvml5xnsvnim60a/coba%201.fla?dl=0