Masking and whatnot

I was wondering if it is possible to make a movie to where when it first loads you dont see anything, then this little dot will fly around the screen, and whereever it goes it will show a picture. It is kind of like what Kirupa did here www.kirupa.com/developer/…xtmask.asp with the text mask, but I want it to be a movie and not have to move the mask, and I want it to stay instead of disapearing after you leave the area. Any ideas?
Thanks

I don’t understand what you mean by

but I want it to be a movie and not have to move the mask
But if you’re using F5, there’s a real fake drag mask tutorial, and if you’re using MX, you want to check the setMask function.

pom 0]

um, like a button mouseover?
or am i completely wrong?