Random "appear and disappear" (flashing) effect with AS2?

Hi, Im looking for a quick help if possible, I want somebody to help me with AS2 to make a simple effect with AS2. The flash work I’m doing has a few squares that I want them to appear and disappear one at a time in different locations, that is to make them flash randomly one by one. That’s it, I will upload a CS3 and F8 file respectively, I hope anyone can help me with this :smiley:

[U][URL=“http://s000.tinyupload.com/?file_id=31079497494426025570”]
Squares_CS3

Squares_F8
[/U]
Thanks