这段代码的是适用于flash 6的，谁能帮我改成flash 8的
if (i<40) {
duplicateMovieClip("_root.snow", "snow" add i, i);
setProperty("snow" add i, _x, random(50)+850);
setProperty("snow" add i, _y, random(200));
setProperty("snow" add i, _alpha, random(75)+20);
setProperty("snow" add i, _xscale, a=random(65));
setProperty("snow" add i, _yscale, a);
i++;
}else {
gotoAndPlay(1);
}