[KUZEN]

В первый кадр и тестим

Stage.scaleMode = "noScale";
Stage.align = "TL";
c = 0;
F_createRandomCube = function () {
	_root.createEmptyMovieClip("mc"+c, c);
	var m = _root["mc"+c];
	var Height = random(10);
	var Width = random(10);
	m._alpha = random(50)+35;
	m._rotation = random(180);
	m._x = random(Stage.width);
	m._y = random(Stage.height);
	with (m) {
		beginFill(0x000000);
		moveTo(0, 0);
		lineTo(0, Height);
		lineTo(Width, Height);
		lineTo(Width, 0);
		lineTo(0, 0);
		endFill();
	}
	m.onEnterFrame = function() {
		this._alpha -= 1;
		if (this._alpha<=0) {
			removeMovieClip(this);
		}
	};
	c++;
};
_root.interval = setInterval(F_createRandomCube, 50);