Send movieClips randomly into the stage

1

I am generating movieClips outside of the stage I want to send them randomly into the stage in enter frame.
Currently it looks like this, so they go like in all directions…
How could I direct each of them randomly **into **the stage?


function timerEvent(e:TimerEvent):void {

    var newObj:MyObj=new MyObj();

    //this places them randomly outside of the stage
    var side:String = RandomOffStage.position(newObj, null, stage, constantString);

    newObj.speedX=Math.random()*20-10;
    newObj.speedY=Math.random()*20-10;

    myArray.push(newObj);
}
addEventListener(Event.ENTER_FRAME, enterFrameHandler, false, 0, true);
function enterFrameHandler(e:Event):void {

    for (var i:uint = 0; i < myArray.length; i++) {

        var myObj:MyObj = (MyObj)(myArray*);

        myObj.x+=myObj.speedX;
        myObj.y+=myObj.speedY;
    }
}