谁有流星的代码??要透明Flash的~~~

var i = 0;
_root.onEnterFrame = function () { //这里_root可以省略!!!
attachMovie("yu", "yu"+i, i++); //现在算是可以理解了~~~这段代码只是说明怎么取影片剪辑
//每秒一个,一秒12颗流星,并且一直如此下去不变
with (_root["yu"+i]) {
_x = 400*Math.random();
_y = 0;
_rotation = 60;
_xscale = _yscale=80+40*Math.random();
var hudu = 60*Math.PI/180;
var xv = Math.cos(hudu)*_xscale/10;
var yv = Math.sin(hudu)*_yscale/10;
//var xv=20,yv=20;

} //以上仅仅是取出并放置流星于舞台之上
_root["yu"+i].onEnterFrame = function() { //以下实现对每个流星运动的控制~~
with (this) {
_x += xv;
_y += yv;
_xscale = _yscale=_alpha -= 2;
if (_x>550 || _y>400) {
this.removeMovieClip();
}
}
};

};