ActionScript 3 Example 2 PlayState Version 3

PlayState.as

package  
{
  /**
	 * ...
	 * @author Dan Cox
	 */
	
	import org.flixel.*;
	 
	public class PlayState extends FlxState 
	{
		private var background:FlxSprite;
		
		public function PlayState() 
		{	
			background = new FlxSprite();
			background.makeGraphic(100, 100);
			add(background);
		}
		override public function update():void
		{
			super.update();
			
			if (FlxG.keys.W || FlxG.keys.UP)
			{
				background.y -= 3;
			}
			else if (FlxG.keys.S || FlxG.keys.DOWN)
			{
				background.y += 3;
			}
			else if (FlxG.keys.A || FlxG.keys.LEFT)
			{
				background.x -= 3;
			}
			else if (FlxG.keys.D || FlxG.keys.RIGHT)
			{
				background.x += 3;
			}
		}
		
	}

}