//写在元件本身的代码
onClipEvent (load) {
        xx = random(550);
        xy = random(400);
        dt = 50;
        this.ys._alpha=random(150)+50;
        var yanse:Color = new Color(this.yanse_mc);
        yanse.setRGB(random(0xffffff));
}
onClipEvent (enterFrame) {
        if (random(dt) == 1) {
                xx = random(550);
                xy = random(400);
        }
        //  
        dx = (xx-_x);
        dy = (xy-_y);
        dx*=.01;
        dy*=.01;
        //dx*=.4;
        //dy*=.4
        _x += dx;
        _y += dy;
        _rotation+=0;
}