Bullet holes with a lifespan

I am trying to create a bullet hole effect when you click the mouse down.

I want a bullet hole to appear where you click the mouse and to stay there, and then when you have > 10 bullet holes on the stage i want to earliest ones to start to fade out.

Here is my code so far:
[AS]
onClipEvent (mouseDown) {
i++;
this.duplicateMovieClip(“BulletHole”+i, i+1);
_root[“BulletHole”+i]._x = _root._xmouse;
_root[“BulletHole”+i]._y = _root._ymouse;
}
[/AS]

However this just duplicates the movie clip and then when you click again it disapears straight away.

What do i need to do to accomplish my aim?

Thanks.
Emdiesse :beer: