stage.addEventListener(KeyboardEvent.KEY_DOWN, onKeyPressed);


function onKeyPressed(evt:KeyboardEvent):void {
   var distance:Number = 10;
 	
   switch (evt.keyCode) {
      case Keyboard.LEFT :
          box.x -= distance;
          break;
      case Keyboard.RIGHT :
          box.x += distance;
          break;
      case Keyboard.UP :
          box.y -= 20;
          break;
      case Keyboard.DOWN :
          box.y += 20;
          break;
      default :
          trace("keyCode: ", evt.keyCode);
   }
	
   keyCode_txt.text = String(evt.keyCode);
  	
   if (box.x > finish.x)
   {
       box.height = 1.2 * box.height;
   }
}