250 semi-transparent circles, of random size, colour and position, drawn in AS3

gistfile1.as

package  {
	import flash.display.Sprite;
	import flash.display.Graphics;
	import flash.events.Event;
	import flash.display.Stage;
		
	public class Shapes extends Sprite {
		private var myShapes:Array = new Array();
		private var myCircle:Sprite = new Sprite();
		private var myCircle2:Sprite = new Sprite();	
		private var myCircle3:Sprite = new Sprite();	
		private var myCircle4:Sprite = new Sprite();	
		private var numShapes:int = 250;
		private var maxXSpeed:int = 3;
		private var maxYSpeed:int = 4;
		
		public function Shapes() {
			addEventListener(Event.ENTER_FRAME, makeThemMove);
			//trace (stage.stageWidth);
			
			//adding shapes to the array
			for (var i:int = 0; i < numShapes; i++){
				var ranRad:int = Math.floor(Math.random()*40);
				var ranCol = Math.random()*0xFFFFFF;
				myShapes.push(drawCircle(ranRad, ranCol));
			}
			
			//displaying shapes
			for (i = 0; i < numShapes; i++){
				addChild(myShapes[i]);
				var ranX:int = Math.floor(Math.random()*stage.stageWidth);
				var ranY:int = Math.floor(Math.random()*stage.stageHeight);
				myShapes[i].x = ranX;
				myShapes[i].y = ranY;
			}
		}
		
		private  function drawCircle(rad: int, f:uint=0XCCCCCC, l:int=1, lCol:uint=0X000000):Sprite {
			//drawing circle inside the graphics object
			var temp:Sprite = new Sprite();
			var gr:Graphics = temp.graphics;
			gr.lineStyle(l, lCol, 0.5);
			gr.beginFill(f, 0.5);
			gr.drawCircle(0,0,rad);
			gr.endFill();
			return temp;
		}
		
		private function makeThemMove(e:Event){
			//var ranXSpeed:int = Math.floor(Math.random() * (maxXSpeed * 2)) - maxXSpeed;
			//var ranYSpeed:int = Math.floor(Math.random() * (maxYSpeed * 2)) - maxYSpeed;
			//trace("I am the move function.");
			for (var i:int = 0; i < numShapes; i++){
				addChild(myShapes[i]);
				//myShapes[i].x -= ranXSpeed;
				//myShapes[i].y += ranYSpeed;
			}
		}
	}
}