===================================================================
--- original.js
+++ change.js
@@ -1,87 +1,99 @@
-/****
+/**** 
 * Classes
-****/
+****/ 
 // Assets will be automatically created and loaded by the LK engine based on their usage in the code.
 // Bird class to represent the player's character
 var Bird = Container.expand(function () {
-  var self = Container.call(this);
-  var birdGraphics = self.attachAsset('bird', {
-    anchorX: 0.5,
-    anchorY: 0.5
-  });
-  self.velocity = 0;
-  self.gravity = 0.5;
-  self.flapStrength = -10;
-  self.update = function () {
-    self.velocity += self.gravity;
-    self.y += self.velocity;
-  };
-  self.flap = function () {
-    self.velocity = self.flapStrength;
-  };
+	var self = Container.call(this);
+	var birdGraphics = self.attachAsset('bird', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.velocity = 0;
+	self.gravity = 0.5;
+	self.flapStrength = -10;
+	self.update = function () {
+		self.velocity += self.gravity;
+		self.y += self.velocity;
+	};
+	self.flap = function () {
+		self.velocity = self.flapStrength;
+	};
 });
+// Obstacle class to represent obstacles
+var Obstacle = Container.expand(function () {
+	var self = Container.call(this);
+	var obstacleGraphics = self.attachAsset('pipe', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = -5;
+	self.update = function () {
+		self.x += self.speed;
+	};
+});
 // Pipe class to represent obstacles
 var Pipe = Container.expand(function () {
-  var self = Container.call(this);
-  var pipeGraphics = self.attachAsset('pipe', {
-    anchorX: 0.5,
-    anchorY: 0.5
-  });
-  self.speed = -5;
-  self.update = function () {
-    self.x += self.speed;
-  };
+	var self = Container.call(this);
+	var pipeGraphics = self.attachAsset('pipe', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = -5;
+	self.update = function () {
+		self.x += self.speed;
+	};
 });
 
-/****
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-  backgroundColor: 0x87CEEB // Sky blue background
+	backgroundColor: 0x87CEEB // Sky blue background
 });
 
-/****
+/**** 
 * Game Code
-****/
+****/ 
 var bird = game.addChild(new Bird());
 bird.x = 2048 / 4;
 bird.y = 2732 / 2;
 var pipes = [];
 var pipeInterval = 1500;
 var lastPipeTime = 0;
 var score = 0;
 var scoreTxt = new Text2('0', {
-  size: 150,
-  fill: "#ffffff"
+	size: 150,
+	fill: "#ffffff"
 });
 scoreTxt.anchor.set(0.5, 0);
 LK.gui.top.addChild(scoreTxt);
 game.down = function (x, y, obj) {
-  bird.flap();
+	bird.flap();
 };
 game.update = function () {
-  bird.update();
-  if (bird.y > 2732 || bird.y < 0) {
-    LK.showGameOver();
-  }
-  if (LK.ticks - lastPipeTime > pipeInterval) {
-    var pipe = new Pipe();
-    pipe.x = 2048;
-    pipe.y = Math.random() * (2732 - 400) + 200;
-    pipes.push(pipe);
-    game.addChild(pipe);
-    lastPipeTime = LK.ticks;
-  }
-  for (var i = pipes.length - 1; i >= 0; i--) {
-    pipes[i].update();
-    if (pipes[i].x < -100) {
-      pipes[i].destroy();
-      pipes.splice(i, 1);
-      score++;
-      scoreTxt.setText(score);
-    }
-    if (bird.intersects(pipes[i])) {
-      LK.showGameOver();
-    }
-  }
+	bird.update();
+	if (bird.y > 2732 || bird.y < 0) {
+		LK.showGameOver();
+	}
+	if (LK.ticks - lastPipeTime > pipeInterval) {
+		var obstacle = new Obstacle();
+		obstacle.x = 2048;
+		obstacle.y = Math.random() * (2732 - 400) + 200;
+		pipes.push(obstacle);
+		game.addChild(obstacle);
+		lastPipeTime = LK.ticks;
+	}
+	for (var i = pipes.length - 1; i >= 0; i--) {
+		pipes[i].update();
+		if (pipes[i].x < -100) {
+			pipes[i].destroy();
+			pipes.splice(i, 1);
+			score++;
+			scoreTxt.setText(score);
+		}
+		if (bird.intersects(pipes[i])) {
+			LK.showGameOver();
+		}
+	}
 };
\ No newline at end of file