If function virker ikke

Kode 

keepRunning = true;
if(keepRunning = true){
 this.createEmptyMovieClip("universe_mc", 10);

// star control variables
var initVel:Number     = 7;
var accel:Number       = 1.1;
var alphaChange:Number = 10;
var myInterval:Object  = setInterval(AddStar, 10);
var maxOffset:Number   = Math.sqrt(Math.pow((Stage.width/2),2) + (Math.pow((Stage.height/2),2)));

var i:Number           = 0;
function AddStar() {
	// a star is born
	var curStar:MovieClip = universe_mc.attachMovie("star", "star_"+i, i);
	++i;
	
	// initialize the baby star
	curStar._x     = Math.random() * Stage.width;
	curStar._y     = Math.random() * Stage.height;
	curStar._alpha = 0;
	
	// calculate which angle star will fly
	// the angle is based on the position of the star from 
	// the center of the stage.
	var xOffset:Number     = curStar._x - (Stage.width/2);
	var yOffset:Number     = curStar._y - (Stage.height/2);
	var totalOffset:Number = Math.sqrt( xOffset*xOffset + yOffset*yOffset ); 
	var velAngle:Number    = Math.atan2(yOffset, xOffset);
	curStar._xVel = initVel * Math.cos( velAngle );
	curStar._yVel = initVel * Math.sin( velAngle );
	curStar._xscale = (maxOffset - totalOffset)/7;
	curStar._yscale = (maxOffset - totalOffset)/7;
	
	// fly away little star
	curStar.onEnterFrame = FlyingStar;
}

function FlyingStar () : Void {
	// move the star
	this._x += this._xVel;
	this._y += this._yVel;
	
	// accelerate the star
	this._xVel *= accel;
	this._yVel *= accel;
	
	// fade the star in
	if (this._alpha < 100) this._alpha += alphaChange;
	else this._alpha = 100;
	
	// check if the star has left the stage
	// if it has, remove it so you don't hog memory
	if (  (this._x < -this._width) || 
		  (this._x > (Stage.width + this._width)) ||
		  (this._y < -this._height) ||
		  (this._y > (Stage.height + this._height))  ) {
		this.removeMovieClip();
	}
}


}