===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,75 @@
-/****
+/**** 
+* Classes
+****/ 
+// Fish class: represents a single fish swimming in the ocean
+var Fish = Container.expand(function () {
+	var self = Container.call(this);
+	// Create a simple ellipse as the fish
+	var fishAsset = self.attachAsset('fish', {
+		width: 120,
+		height: 60,
+		color: 0xffcc66,
+		shape: 'ellipse',
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	// Randomize initial position and speed
+	self.x = Math.random() * 2048;
+	self.y = 400 + Math.random() * 1800;
+	self.speed = 2 + Math.random() * 3;
+	// Track lastX for edge detection
+	self.lastX = self.x;
+	// Fish swims to the right, loops back to left when off screen
+	self.update = function () {
+		self.lastX = self.x;
+		self.x += self.speed;
+		if (self.lastX <= 2048 && self.x > 2048) {
+			self.x = -100;
+			self.y = 400 + Math.random() * 1800;
+			self.speed = 2 + Math.random() * 3;
+		}
+	};
+	return self;
+});
+var Ocean = Container.expand(function () {
+	var self = Container.call(this);
+	// Create a large blue rectangle as the ocean background
+	var oceanAsset = self.attachAsset('ocean', {
+		width: 2048,
+		height: 2732,
+		color: 0x3399ff,
+		shape: 'box',
+		anchorX: 0,
+		anchorY: 0,
+		x: 0,
+		y: 0
+	});
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
 	backgroundColor: 0x000000
-});
\ No newline at end of file
+});
+
+/**** 
+* Game Code
+****/ 
+// Add ocean background
+var ocean = new Ocean();
+game.addChild(ocean);
+// Add several fish swimming in the ocean
+var fishArray = [];
+for (var i = 0; i < 7; i++) {
+	var fish = new Fish();
+	fishArray.push(fish);
+	game.addChild(fish);
+}
+// Update fish positions every frame
+game.update = function () {
+	for (var i = 0; i < fishArray.length; i++) {
+		fishArray[i].update();
+	}
+};
\ No newline at end of file