Alpha if/else question

1

On a movie clip I have the following:


onClipEvent(load){
	this._alpha = 0;
}
onClipEvent (enterFrame) {
	if (this._alpha <= 0){
		this._alpha +=5;
	}
}

This only increases the alpha one step. Seems like the (enterframe) isn’t repeating. Should I add an else statement to tell it when to stop?
I suck.