[sergwizard]

Вот так, наверное, интереснее будет. И параллакс есть, и рывков нет.

xmin = 0;
xmax = 550;
ymax = 300;
num = 400;
levels = 6;
this.createEmptyMovieClip("StarSky", -1)
with (StarSky) {
	colors = [0x000033, 0x000066];
	alphas = [100,100];
	ratios = [0, 100];
	matrix = {a:0, b:450, c:0, d:300, e:0, f:0, g:0, h:300, i:0};
	beginGradientFill("linear", colors, alphas, ratios, matrix);
	lineTo(550,0); lineTo(550,300); lineTo(0,300)
	endFill()
}
this.createEmptyMovieClip("star",0);
with(star){
	lineStyle(1,0xFFFFFF,100);
	lineTo(2,0);
	moveTo(1,-1);
	lineTo(1,1);
}
MovieClip.prototype.stary = function(){
	this._x = random(xmax);
	this._y = random(ymax);
	this.xspeed = Math.round(this.i/num*levels);
	this._xscale = this.xspeed*20;
	this._yscale = this.xspeed*20;
	this.onEnterFrame = function(){
		this._x+=(this.xspeed)/5;
		if(this._x>xmax){
			this._x = xmin;
		}
	}
}
for(i=1;i<num;i++){
	star.duplicateMovieClip("star"+i,i);
	_root["star"+i].i = i;
	_root["star"+i].stary();
}

fps = 30;