MY PC code on animate

package
{
	import flash.display.MovieClip;
	import flash.events.MouseEvent;
	import flash.utils.Endian;

	public class Presentation extends MovieClip
	{
		//declare the variables
		//these variables are visible to all the functions
		var pages:Array = new Array();
		var currentIndex:uint;
		var currentPage:MovieClip;

		public function Presentation() //this is the constructor, and runs automatically
		{
			// constructor code
			pages[0] = new Start();
			pages[1] = new Slide1();
			pages[2] = new Slide2();
			pages[3] = new Slide3();
			pages[4] = new Slide4();	//do this to add a page
			pages[5] = new Slide5();
			pages[6] = new Slide6();
			pages[7] = new Slide7();
			pages[8] = new End();

			currentIndex = 0;
			currentPage = pages[currentIndex];
			stage.addChild(currentPage);

			var nav:Navigation = new Navigation();
			nav.y = 400;
			nav.alpha = 0.5;
			stage.addChild(nav);
			nav.right.addEventListener(MouseEvent.CLICK, onRightClick);
			nav.left.addEventListener(MouseEvent.CLICK, onLeftClick);
		}
	}

		public function onRightClick(event:MouseEvent)
		{
			if(currentIndex < pages.length - 1)
			{
				currentIndex++;
				stage.removeChild(currentPage);
				currentPage = pages[currentIndex];
				stage.addChild(currentPage);

				stage.setChildIndex(currentPage, 0);
			}
		}

		public function onLeftClick(event:MouseEvent)
		{
			if(currentIndex > 0)
			{
				currentIndex--;
				var oldPage = currentPage;
				currentPage = pages[currentIndex];
				stage.addChild(currentPage);
				stage.removeChild(oldPage);
				stage.setChildIndex(currentPage, 0);
			}
		}

	}

}