Trying to Fade movie clips out using the Tween class

I am pretty sure that I am posting this question in the wrong place, but I am doing so in the hopes that someone will point me in the right direction and perhaps answer my question.
I have created 3 movie clips and put them on my stage. I was able to get them to appear in the order that I want, however, how do I get them to dissappear in the order that I want? Here is the code that I have so far:

import mx.transitions.Tween;
import mx.transitions.easing.*;
new Tween(myLogo_mc, “_alpha”, Regular.easeIn, 0, 100, 1, true);
if (_alpha == “100”) {
play();
}
new Tween(powered_mc, “_alpha”, Regular.easeIn, 0, 100, 2, true);
if (_alpha == “100”) {
play();
}
new Tween(adobe_mc, “_alpha”, Strong.easeIn, 0, 100, 3, true);

I would like to have the last two MC fade out (alpha down) and the myLogo_mc stay visible on the stage.

HELP!!!