/**** 
* Classes
****/ 
// Define the Obstacle class
var Obstacle = Container.expand(function () {
	var self = Container.call(this);
	var obstacleGraphics;
	var randomNum = Math.random();
	if (randomNum > 0.75) {
		obstacleGraphics = self.attachAsset('motorracer', {
			anchorX: 0.5,
			anchorY: 0.5
		});
	} else if (randomNum > 0.5) {
		obstacleGraphics = self.attachAsset('ccrcar', {
			anchorX: 0.5,
			anchorY: 0.5
		});
	} else if (randomNum > 0.25) {
		obstacleGraphics = self.attachAsset('ccrcar2', {
			anchorX: 0.5,
			anchorY: 0.5
		});
	} else {
		obstacleGraphics = self.attachAsset('truck', {
			anchorX: 0.5,
			anchorY: 0.5
		});
	}
	self.speed = 5;
	if (obstacleGraphics.id === 'motorracer') {
		self.sandDust = new SandDust();
		self.sandDust.x = self.x;
		self.sandDust.y = self.y + self.height / 2;
		game.addChild(self.sandDust);
	}
	self.update = function () {
		self.y += self.speed;
		if (self.sandDust) {
			self.sandDust.x = self.x;
			self.sandDust.y = self.y + self.height / 2;
			self.sandDust.update();
			self.sandDust.animate();
		}
		if (self.y > 2732) {
			self.y = -self.height;
		}
	};
});
//<Assets used in the game will automatically appear here>
//<Write imports for supported plugins here>
// Define the Player class
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerGraphics = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 5;
	self.update = function () {
		// Player update logic
	};
});
// Define the SandDust class
var SandDust = Container.expand(function () {
	var self = Container.call(this);
	var dustGraphics = self.attachAsset('sandDust', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 5;
	self.update = function () {
		self.y += self.speed;
		if (self.y > 2732) {
			self.y = -self.height;
		}
	};
	self.animate = function () {
		// Add animation logic here
		dustGraphics.alpha -= 0.04;
		if (dustGraphics.alpha <= 0) {
			dustGraphics.alpha = 1;
		}
	};
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x000000 //Init game with black background
});

/**** 
* Game Code
****/ 
var road = game.attachAsset('road', {
	anchorX: 0.5,
	anchorY: 0.5
});
road.x = 2048 / 2;
road.y = 2732 / 2;
// Initialize player
var player = new Player();
player.x = 2048 / 2;
player.y = 2732 - 200;
game.addChild(player);
// Initialize sand dust under the player
var sandDust = new SandDust();
sandDust.x = player.x;
sandDust.y = player.y + player.height / 2;
game.addChild(sandDust);
// Initialize obstacles
var obstacles = [];
var previousY = 0;
for (var i = 0; i < 3; i++) {
	var obstacle = new Obstacle();
	// Ensure that obstacles cannot reach the left and right side edges of the map
	// Subtract the width of the obstacle from the total width to prevent the obstacle from reaching the edges
	obstacle.x = Math.random() * (2048 - obstacle.width);
	// Increase the minimum spacing between obstacles to 300px
	obstacle.y = previousY - 300 - Math.random() * 100;
	previousY = obstacle.y;
	// Check if the new obstacle overlaps with any of the existing obstacles
	for (var j = 0; j < obstacles.length; j++) {
		if (obstacle.intersects(obstacles[j])) {
			// If it overlaps, reposition the obstacle
			obstacle.x = Math.random() * (2048 - obstacle.width);
			obstacle.y = previousY - 300 - Math.random() * 100;
			previousY = obstacle.y;
		}
	}
	obstacles.push(obstacle);
	game.addChild(obstacle);
}
// Handle touch events for player movement
game.down = function (x, y, obj) {
	this.startX = x;
};
game.move = function (x, y, obj) {
	if (this.startX) {
		var deltaX = x - this.startX;
		this.startX = x;
		player.x += deltaX;
	}
};
game.up = function (x, y, obj) {
	this.startX = null;
};
// Update game logic
game.update = function () {
	player.update();
	sandDust.update();
	sandDust.animate();
	sandDust.x = player.x;
	sandDust.y = player.y + player.height / 2;
	obstacles.forEach(function (obstacle) {
		obstacle.update();
		if (player.intersects(obstacle)) {
			LK.effects.flashScreen(0xff0000, 1000);
			LK.showGameOver();
		}
	});
	// Move the road downwards to create an illusion of player moving forward
	road.y += 25;
	// If the road has moved off the screen, reset its position to create a loop
	if (road.y > 2732) {
		road.y = 0;
	}
};

===================================================================
--- original.js
+++ change.js
@@ -27,18 +27,22 @@
 			anchorY: 0.5
 		});
 	}
 	self.speed = 5;
-	self.sandDust = new SandDust();
-	self.sandDust.x = self.x;
-	self.sandDust.y = self.y + self.height / 2;
-	game.addChild(self.sandDust);
-	self.update = function () {
-		self.y += self.speed;
+	if (obstacleGraphics.id === 'motorracer') {
+		self.sandDust = new SandDust();
 		self.sandDust.x = self.x;
 		self.sandDust.y = self.y + self.height / 2;
-		self.sandDust.update();
-		self.sandDust.animate();
+		game.addChild(self.sandDust);
+	}
+	self.update = function () {
+		self.y += self.speed;
+		if (self.sandDust) {
+			self.sandDust.x = self.x;
+			self.sandDust.y = self.y + self.height / 2;
+			self.sandDust.update();
+			self.sandDust.animate();
+		}
 		if (self.y > 2732) {
 			self.y = -self.height;
 		}
 	};