package {
     import flash.display.MovieClip;
     public class BallDocumentClass extends MovieClip {
          private var tempBall:Ball;
          private var MAX_BALLS:uint = 10;
          public function BallDocumentClass() {
              var i:uint;
              for (i = 0; i < MAX_BALLS; i++) {
                   tempBall = new Ball ();
                   tempBall.scaleX = Math.random();
                   tempBall.scaleY = tempBall.scaleX;
                   tempBall.x = Math.round(Math.random() * (this.stage.stageWidth - tempBall.width));
                   tempBall.y = Math.round(Math.random() * (this.stage.stageHeight - tempBall.height));
                   addChild(tempBall);
              }	
          }
     }
}