ActionScript 3.0 :: Adding Random MovieClip From Library To Stage Dynamically?

How to add random movie clip to stage from many different movie clips in library? If I wanted to add one movie clip to stage I would do liko so:

Code:
stage.addEventListener(MouseEvent.MOUSE_MOVE, onMove);
function onMove(e:MouseEvent):void {
var mc:MovieClip = new Ball();
mc.x = mouseX;
mc.y = mouseY;
addChild(mc);
}

Code above works perfect but I tried following but with no success, no errors, but nothing happens - no mc's are added to stage. I have 6 movie clips in library and they all are linked, exported for actionscript. On MouseOver I want to add random movie clip from those six movie clips to the stage.

Code:
var myArray:Array = [mc1, mc2, mc3, mc4, mc5, mc6];
stage.addEventListener(MouseEvent.MOUSE_OVER, onLoop);
function onLoop(e:MouseEvent):void {
for (var i:int = 0; i< myArray.length; i++) {
var randomMc:Number = Math.floor(Math.random()*i);
var mc:MovieClip = new myArray[randomMc];
addChild(mc);
mc.x = mouseX;
mc.y = mouseY;
}}