package 
{
	import flash.display.Shape;
	import flash.events.Event;
	import flash.filters.BlurFilter;

	public class Snowflake extends Shape 
	{
		private var stageWidth:int = 0;
		private var stageHeight:int = 0;
		private var highestDropSpeed:uint = 16;
		private var dropSpeed:int = Math.round(Math.random() * Math.random() * highestDropSpeed);
		private var incrementer:int = Math.round(Math.random() * 100);
		private var shades:Array = [ 0xFFFFFF, 0xCCCCCC, 0x999999, 0x666666 ];
		private var windSpeed:int = 2;
		private var snowObj:Shape = new Shape();
		
		public function Snowflake(w:uint, h:uint) 
		{
			stageWidth = w;
			stageHeight = h;
			init()
		}
		public function init():void
		{
			graphics.beginFill(shades[ Math.ceil(Math.random() * shades.length) ]);
			graphics.drawCircle(0, 0, 4);
			graphics.endFill();
			filters = [ new BlurFilter(1, dropSpeed, 1) ];
			addEventListener(Event.ENTER_FRAME, update); 
			reset();
		}
		private function reset():void 
		{
			y = Math.random() * stageHeight * -1;
			x = Math.random() * stageWidth - (windSpeed * 100);
			scaleX = scaleY = 0.25 + (Math.random() * Math.random() * 0.75);
		}
		private function update(e:Event):void 
		{
			y += dropSpeed;
			x += windSpeed + Math.sin(incrementer / 10) * (1 / (dropSpeed / 3));
			if (y > stageHeight) 
			{
				reset();
			}
			incrementer++;
		}
   }
}