// Example:  Array of Dynamic Objects

package
{
	import flash.display.*;
	import flash.events.*;
	import flash.utils.*;
	
	public class Wk9ArrayOfDynamicObjects extends MovieClip
	{
		// A declaration of an empty array
		var list: Array = new Array();
		// Timer to create a new alien object at each second, 
		// up to 500 maximum 
		var alienTimer: Timer = new Timer(1000, 500);
		var speed = 5;
		
		function Wk9ArrayOfDynamicObjects( )
		{
			alienTimer.addEventListener(TimerEvent.TIMER, addAlien);
			alienTimer.start();
			// Frame event that will move all of the aliens at each frame, 
			// thus animating them  
			stage.addEventListener(Event.ENTER_FRAME, moveAlien)
		}  // end constructor
		
		// Create a new alien object of a random size and at a random height 
		// Add the new alien object both to the display list and to the array
		function addAlien(evt: TimerEvent)
		{
			var alien: AlienHead = new AlienHead()
			alien.height = alien.width = Math.random( ) * 100 + 50
			alien.y = Math.random() * 300 + 100
			alien.x = 500
			addChild(alien)
			list.push(alien)
		}  // end addAlien
		
		// Move all of the aliens 5 pixels to the left 
		function moveAlien(evt: Event)
		{
			for( var i = 0; i < list.length; i ++ )
			{
				list[i].x = list[i].x - speed;
			}
		}  // end moveAlien

	}
}