ball.graphics.beginFill(0xff0000);
  ball.graphics.drawCircle(0, 0, radius);
  ball.x = 200;
  ball.y = 200;
  avx.push(Math.random() * 30 - 5);
  avy.push(-20);
  slist.addChild(ball);
  sprites = new Array();
  sprites.push(ball);
  
  myVid.addChild(slist);
  myVid.mask = slist;
  
  addEventListener(Event.ENTER_FRAME, frame);
  addEventListener(MouseEvent.MOUSE_DOWN, onMouseDown);
  }