Æliens

    private function init():void {
     xpos = 0;
     graphics.lineStyle(1, 0, 1);
     graphics.moveTo(0, centerY);
     addEventListener(Event.ENTER_FRAME, onEnterFrame);
    }
  

    public function onEnterFrame(event:Event):void {
     xpos += xspeed;
     angle += yspeed;
     ypos = centerY + Math.sin(angle) * range;
     graphics.lineTo(xpos, ypos);
    }
   }
  }