package {

	import flash.display.MovieClip;
	import flash.events.Event;
	import flash.utils.getTimer;
	
	
	public class CorrectSpeed extends MovieClip {
		
		private var speed:Number;
		var lastTime:Number;
		
		public function CorrectSpeed() {
			super();
			
			addEventListener(Event.ADDED_TO_STAGE, onStage);
		}
		

		private function onStage(e:Event):void {
			speed = stage.stageWidth * .25; // pixels per second -- 4 seconds to cross stage
			lastTime = getTimer();
			removeEventListener(Event.ADDED_TO_STAGE, onStage);
			addEventListener(Event.ENTER_FRAME, onFrame);
		}

		private function onFrame(e:Event):void {
			var time:Number = getElapsedSec();
			var distance:Number = speed * time;
			x += distance;
			if (x > (stage.stageWidth + width)) { x -= (stage.stageWidth + width + width); }
		}
		
		private function getElapsedSec():Number {
			var thisTime = getTimer();
			var seconds:Number = (thisTime - lastTime) / 1000.0;
			lastTime = thisTime;
			return seconds;
		}
	}

}