Groups examples and some boolean checks corrected

examples/groups/get first.php

@@ -0,0 +1,72 @@
+ 
+ <?php
+    $title = "Getting the first child";
+    require('../head.php');
+?>
+
+<script type="text/javascript">
+
+(function () {
+
+    var game = new Phaser.Game(800, 600, Phaser.CANVAS, '', { preload: preload, create: create,update:update,render:render});
+
+    function preload() {
+        game.load.spritesheet('item', 'assets/buttons/number-buttons-90x90.png', 90, 90);
+        game.load.image('reviveBtn', 'assets/buttons/revive-button.png');
+        
+    }
+
+    var timer,
+    	cycle;
+
+    function create() {
+        // Add some items.
+        var item;
+        for (var i = 0; i < 3; i++) {
+            // Give the items a different alpha increase speed.
+            item = game.add.sprite(290, 98 * (i + 1), 'item', i);
+            // An item beside the left one.
+            item = game.add.sprite(388, 98 * (i + 1), 'item', i + 3);
+        }
+
+        // Set a timer so we can perform an action after a delay.
+        timer = 0;
+        cycle = 1000;
+        
+    }
+    function update() {
+    	
+
+       
+        
+        if (game.time.now > timer) {
+
+        	 // Update timer.
+            timer = game.time.now +cycle;
+            
+            // Get the first alive item and kill it.
+            var item = game.world.group.getFirstAlive();
+
+            if(item){
+
+            	item.kill();
+            }
+            
+
+        }
+
+    }
+    function render() {
+
+        game.debug.renderText('One item will be killed each second.', 280, 420);
+        // Get living and dead number of a group.
+        game.debug.renderText('Living: ' + game.world.group.countLiving() + ', Dead: ' + game.world.group.countDead(), 330, 440);
+    }
+
+})();
+
+</script>
+
+<?php
+    require('../foot.php');
+?>