What do i do after this

1

I am creating a game where a ufo has to dodge balls and when the ufo hits the ball it subtracts a movie clip (which is part of a health bar) and then what do i add to the else that makes it go on and do notthing this is what i have below and when i use it even if the ufo doesn’t hit the ball it subtracts the movie clip.

onClipEvent (enterFrame) {
if (_root.mover, hitTest(_root.dot)) {
setProperty ("/1", _yscale, “0”);
setProperty ("/1", _xscale, “0”);
} else {
}
}

dot=the ball

so just tell me what i need in the else spot the other spots are fine tnkz.