Tween class ActionScript 2.0

I have several movieclips that I want to have drop down on the stage. I am using the Bounce tween. However, I want the 1st movie clip to drop first, followed by the 2nd, the 3rd and so forth. How do I achieve this one after the other effect? Here is my code so far:

stop();
import mx.transitions.Tween;
import mx.transitions.easing.*;

var kTween:Tween = new Tween (k_mc, “_y”, Bounce.easeOut, k_mc._y, 319.3, 48, false);
kTween.onMotionFinished = function () {
if (this.runOnce) {
this.runOnce = true;
play();
}
}
var cTween:Tween = new Tween (c_mc, “_y”, Bounce.easeOut, k_mc._y, 319.3, 48, false);
kTween.onMotionFinished = function () {
play();
}

This is causing the first 2 movie clips to play at the same time.