===================================================================
--- original.js
+++ change.js
@@ -16,24 +16,49 @@
 	var bulletGraphics = self.createAsset('bullet', 'Bullet Graphics', .5, .5);
 	self.speed = 10;
 	self.move = function () {};
 });
-var Enemy = Container.expand(function () {
+var YellowEnemy = Container.expand(function () {
 	var self = Container.call(this);
-	var enemyGraphics = self.createAsset('enemy', 'Enemy character', .5, .5);
+	var enemyGraphics = self.createAsset('yellowEnemy', 'Yellow Enemy character', .5, .5);
+	self.speed = 3;
 	self.move = function () {
-		self.y += 5;
+		self.y += self.speed;
 	};
 });
+var BlueEnemy = Container.expand(function () {
+	var self = Container.call(this);
+	var enemyGraphics = self.createAsset('blueEnemy', 'Blue Enemy character', .5, .5);
+	self.speed = 5;
+	self.move = function () {
+		self.y += self.speed;
+	};
+});
+var RedEnemy = Container.expand(function () {
+	var self = Container.call(this);
+	var enemyGraphics = self.createAsset('redEnemy', 'Red Enemy character', .5, .5);
+	self.speed = 8;
+	self.move = function () {
+		self.y += self.speed;
+	};
+});
 var Game = Container.expand(function () {
 	var self = Container.call(this);
 	var santa = self.addChild(new Santa());
 	var bullets = [];
 	var enemies = [];
 	santa.x = 2048 / 2;
 	santa.y = 2732 - santa.height;
 	var spawnEnemy = function () {
-		var enemy = new Enemy();
+		var enemyType = Math.random();
+		var enemy;
+		if (enemyType < 0.33) {
+			enemy = new YellowEnemy();
+		} else if (enemyType < 0.66) {
+			enemy = new BlueEnemy();
+		} else {
+			enemy = new RedEnemy();
+		}
 		enemy.x = Math.random() * 2048;
 		enemy.y = 0;
 		enemies.push(enemy);
 		self.addChild(enemy);