[etc]

var counter:Number = 0;
var snowClipBaseName:String = "snow";

function randRange(min:Number, max:Number):Number
{
	var randomNum:Number = Math.round(Math.random() * (max - min)) + min;
	return randomNum;
}

generate = function()
{
	var newSnowClipName:String = snowClipBaseName + counter;
	var newSnowClipX:Number = randRange(0, Stage.width);
	var newSnowClipScale:Number = randRange(20, 100);
	var newSnowClipAlpha:Number = randRange(30, 100);
	var newSnowClip:MovieClip = _root.attachMovie("snow", newSnowClipName, this.getNextHighestDepth(), {_x:newSnowClipX, _y:0, _xscale:((randRange(1, 2) == 1 ? 1 : -1) * newSnowClipScale), _yscale:newSnowClipScale, _alpha:newSnowClipAlpha});
	newSnowClip.onEnterFrame = function()
	{
		if (this._currentframe == this._totalframes)
		{
			this.removeMovieClip();
		}
	}
	counter++;
	if (counter > 1000)
	{
		counter = 0;
	}
}
setInterval(this,'generate',500); // чем меньше параметр, тем больше снежинок