[GBee]

bl5.addEventListener(MouseEvent.CLICK, pro);
var a:int = 10;
var flag:Boolean = true;
function  pro(event:MouseEvent):void
{
	if (flag)
	{
		myRocket1.alpha -= 0.1;
		a--;
	}
	else
	{
		myRocket1.alpha += 0.1;
        a++;
	}
    if(a == 0 || a == 10)
        flag = !flag;
}