Detecting mouse angle easily

Make one movie clip (be shure that the shape you draw in this movie clip is in 0 degrees)and then, put another inside it that will not be seen, now in this last movie clip write the next:

onClipEvent (enterFrame) {
    z=_root._xmouse-_parent._x;
    r=_root._ymouse-_parent._y;
    _root.a=z;
    _root.b=r;
}
onClipEvent (enterFrame) {
    e=z/r;
    k=Math.atan (e);
}
onClipEvent (enterFrame) {
    g=k*180/Math.PI;
    _rotation=g;
    if (_root._ymouse>_parent._y) {
        _parent._rotation=90-_rotation;
    } else if (_root._ymouse<_parent._y) {
        _parent._rotation=180-(_rotation-90);
    }
}

With that, you can easily detect the mouse angle and copy the number of movie clips that you want. If you want the movie clip to go after the mouse too, write the next on the fist movie clip actions:

onClipEvent (enterFrame) {
    g = _rotation*0.01745;
    z = Math.cos(g);
    n = Math.sin(g);
}
onClipEvent (enterFrame) {
    _x += z*3;
    _y += n*3;
}

That´s it...