Interactive Graphics Progress!

import flash.display.Sprite;
import flash.events.MouseEvent;
for(i = 1; i< 50; i++)
{
var mc1:MovieClip = new MovieClip();
var circle1:Sprite = new Sprite();
circle1.graphics.beginFill(Math.random() *0xFF0000);
circle1.graphics.drawCircle(0, 0, 30*Math.random()+20);
mc1.addEventListener(MouseEvent.MOUSE_DOWN, drag);
mc1.addEventListener(MouseEvent.MOUSE_UP, stopdrag);
mc1.y = 380*Math.random()+10;
mc1.x = 600*Math.random()+15;
mc1.buttonMode = true;
mc1.addChild(circle1);
this.addChild(mc1);
}
function drag(event:MouseEvent):void {
event.target.startDrag();
}
function stopdrag(event:MouseEvent):void {
event.target.stopDrag();
}
function click(event:MouseEvent):void {
mc2.x += 5;
}