[F8]making a small mc play randomly

[apowell0224]

basically i mad an intro, and at the end i wish to insert a movieclip that flickers and makes the screen black for 2 frames. However i wish it to do so randomly but i have absolutely no clue which script to use.
can some1 help me achieve this?

[cresquin]

var nextInterval = 100;
flickerInterval = setInterval(flicker, nextInterval);
function flicker(){
    nextInterval = Math.random() * 100
    myBlackScreen._visible = !myBlackScreen._visible;
    clearInterval(flickerInterval);
    flickerInterval = setInterval(flicker, nextInterval);
} 

[apowell0224]

thanks so much cresquin this is perfect

[apowell0224]

however i do have a question
can you please explain this to me? wish to learn what it means and what to substitute.

[cresquin]

I did a little write-up here:

http://www.theorigin.net/view_post/120.html