/**** 
* Plugins
****/ 
var tween = LK.import("@upit/tween.v1");

/**** 
* Classes
****/ 
var Customer = Container.expand(function () {
	var self = Container.call(this);
	var graphics = self.attachAsset('customer', {
		anchorX: 0.5,
		anchorY: 1
	});
	self.items = [];
	self.currentItemIndex = 0;
	self.isBeingServed = false;
	self.patience = 100;
	self.maxPatience = 100;
	self.waitTime = 0;
	self.isShopping = true;
	self.targetShelf = null;
	self.itemsToCollect = Math.floor(Math.random() * 3) + 2;
	self.placeItemsOnCounter = function () {
		var startX = 1024 - self.items.length * 100 / 2;
		for (var i = 0; i < self.items.length; i++) {
			var item = self.items[i];
			item.x = startX + i * 100;
			item.y = counterY - 150; // Place items on top of cash register
			game.addChild(item);
		}
	};
	self.allItemsScanned = function () {
		for (var i = 0; i < self.items.length; i++) {
			if (!self.items[i].scanned) {
				return false;
			}
		}
		return true;
	};
	self.getTotalValue = function () {
		var total = 0;
		for (var i = 0; i < self.items.length; i++) {
			total += self.items[i].value;
		}
		return total;
	};
	self.completeTransaction = function () {
		// Remove items from counter
		for (var i = 0; i < self.items.length; i++) {
			if (self.items[i].parent) {
				self.items[i].destroy();
			}
		}
		// Add to score
		LK.setScore(LK.getScore() + self.getTotalValue());
		scoreTxt.setText('Score: ' + LK.getScore());
		// Play sound
		LK.getSound('cashRegister').play();
		// Move customer out
		tween(self, {
			x: -200
		}, {
			duration: 1000,
			onFinish: function onFinish() {
				self.destroy();
			}
		});
	};
	self.collectItemFromShelf = function () {
		if (self.items.length < self.itemsToCollect && self.targetShelf) {
			if (self.targetShelf.takeProduct()) {
				var item = new Item();
				self.items.push(item);
				// Visual feedback
				tween(graphics, {
					scaleX: 1.2,
					scaleY: 1.2
				}, {
					duration: 200,
					onFinish: function onFinish() {
						tween(graphics, {
							scaleX: 1,
							scaleY: 1
						}, {
							duration: 200
						});
					}
				});
			}
		}
	};
	self.update = function () {
		if (self.isBeingServed) {
			self.waitTime++;
			if (self.waitTime > 60) {
				// After 1 second
				self.patience -= 0.5;
				if (self.patience <= 0) {
					// Customer leaves angry
					self.completeTransaction();
				}
			}
		}
	};
	return self;
});
var Item = Container.expand(function () {
	var self = Container.call(this);
	var graphics = self.attachAsset('item', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.scanned = false;
	self.value = Math.floor(Math.random() * 5) + 1; // Random value 1-5
	// Visual feedback for scanned items
	self.scan = function () {
		if (!self.scanned) {
			self.scanned = true;
			graphics.tint = 0x90EE90; // Light green when scanned
			LK.getSound('itemScan').play();
		}
	};
	self.down = function (x, y, obj) {
		self.scan();
	};
	return self;
});
var Shelf = Container.expand(function () {
	var self = Container.call(this);
	var graphics = self.attachAsset('shelf', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.products = [];
	// Create products on shelf
	self.createProducts = function () {
		var rows = 3;
		var cols = 3;
		var spacing = 80;
		var startX = -100;
		var startY = -120;
		for (var row = 0; row < rows; row++) {
			for (var col = 0; col < cols; col++) {
				var product = self.attachAsset('product', {
					anchorX: 0.5,
					anchorY: 0.5
				});
				product.x = startX + col * spacing;
				product.y = startY + row * spacing;
				product.available = true;
				self.products.push(product);
			}
		}
	};
	self.createProducts();
	self.takeProduct = function () {
		for (var i = 0; i < self.products.length; i++) {
			if (self.products[i].available) {
				self.products[i].available = false;
				self.products[i].visible = false;
				return true;
			}
		}
		return false;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0xf5f5f5
});

/**** 
* Game Code
****/ 
var customers = [];
var customerQueue = [];
var currentCustomer = null;
var spawnTimer = 0;
var spawnDelay = 180; // 3 seconds at 60fps
var counterY = 2300; // Bottom of screen
// Create shelves
var shelves = [];
var shelfPositions = [{
	x: 400,
	y: 800
}, {
	x: 800,
	y: 800
}, {
	x: 1200,
	y: 800
}, {
	x: 1600,
	y: 800
}];
for (var i = 0; i < shelfPositions.length; i++) {
	var shelf = new Shelf();
	shelf.x = shelfPositions[i].x;
	shelf.y = shelfPositions[i].y;
	shelves.push(shelf);
	game.addChild(shelf);
}
// Create cash register at bottom center
var cashRegister = game.addChild(LK.getAsset('cashRegister', {
	anchorX: 0.5,
	anchorY: 0.5
}));
cashRegister.x = 1024; // Center of screen
cashRegister.y = counterY; // Bottom position
// Create queue area just above cash register
var queueArea = game.addChild(LK.getAsset('queueArea', {
	anchorX: 0.5,
	anchorY: 0.5
}));
queueArea.x = 1024;
queueArea.y = counterY - 300; // Position above cash register
// Create score display
var scoreTxt = new Text2('Score: 0', {
	size: 60,
	fill: 0x000000
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Create instructions
var instructionsTxt = new Text2('Tap items to scan them!', {
	size: 40,
	fill: 0x666666
});
instructionsTxt.anchor.set(0.5, 0);
instructionsTxt.y = 80;
LK.gui.top.addChild(instructionsTxt);
function spawnCustomer() {
	var customer = new Customer();
	customer.x = 1024; // Center of screen
	customer.y = -200; // Above screen
	customers.push(customer);
	game.addChild(customer);
	// Customer shopping sequence
	var shelfIndex = 0;
	var _visitShelf = function visitShelf() {
		if (shelfIndex < shelves.length && customer.items.length < customer.itemsToCollect) {
			var targetShelf = shelves[Math.floor(Math.random() * shelves.length)];
			tween(customer, {
				x: targetShelf.x,
				y: targetShelf.y + 250
			}, {
				duration: 1500,
				onFinish: function onFinish() {
					customer.targetShelf = targetShelf;
					customer.collectItemFromShelf();
					shelfIndex++;
					LK.setTimeout(function () {
						if (customer.items.length < customer.itemsToCollect) {
							_visitShelf();
						} else {
							// Done shopping, join queue
							customer.isShopping = false;
							customerQueue.push(customer);
							var queuePosition = 1224 - (customerQueue.length - 1) * 150; // Start from right, go left
							tween(customer, {
								x: queuePosition,
								y: counterY - 300
							}, {
								duration: 1500
							});
						}
					}, 500);
				}
			});
		}
	};
	// Start shopping by entering store
	tween(customer, {
		y: 400
	}, {
		duration: 1000,
		onFinish: function onFinish() {
			_visitShelf();
		}
	});
}
function serveNextCustomer() {
	if (customerQueue.length > 0 && !currentCustomer) {
		currentCustomer = customerQueue.shift();
		currentCustomer.isBeingServed = true;
		// Move customer to cash register
		tween(currentCustomer, {
			x: 1024,
			y: counterY - 200
		}, {
			duration: 1500,
			onFinish: function onFinish() {
				currentCustomer.placeItemsOnCounter();
			}
		});
		// Move other customers forward in queue (right to left)
		for (var i = 0; i < customerQueue.length; i++) {
			var queuePos = 1224 - i * 150; // Reposition from right to left
			tween(customerQueue[i], {
				x: queuePos
			}, {
				duration: 1000
			});
		}
	}
}
game.update = function () {
	spawnTimer++;
	// Spawn new customers
	if (spawnTimer >= spawnDelay) {
		spawnCustomer();
		spawnTimer = 0;
		// Gradually increase spawn rate
		if (spawnDelay > 120) {
			spawnDelay -= 2;
		}
	}
	// Check if current customer transaction is complete
	if (currentCustomer && currentCustomer.isBeingServed) {
		if (currentCustomer.allItemsScanned()) {
			currentCustomer.completeTransaction();
			// Remove from customers array
			for (var i = customers.length - 1; i >= 0; i--) {
				if (customers[i] === currentCustomer) {
					customers.splice(i, 1);
					break;
				}
			}
			currentCustomer = null;
			// Serve next customer after a short delay
			LK.setTimeout(function () {
				serveNextCustomer();
			}, 500);
		}
	}
	// Serve next customer if none is being served
	if (!currentCustomer) {
		serveNextCustomer();
	}
	// Game over condition - too many customers waiting
	if (customerQueue.length >= 5) {
		LK.showGameOver();
	}
};
// Initial customer spawn
LK.setTimeout(function () {
	spawnCustomer();
}, 1000);

===================================================================
--- original.js
+++ change.js
@@ -260,9 +260,9 @@
 						} else {
 							// Done shopping, join queue
 							customer.isShopping = false;
 							customerQueue.push(customer);
-							var queuePosition = 800 + (customerQueue.length - 1) * 150;
+							var queuePosition = 1224 - (customerQueue.length - 1) * 150; // Start from right, go left
 							tween(customer, {
 								x: queuePosition,
 								y: counterY - 300
 							}, {
@@ -297,11 +297,11 @@
 			onFinish: function onFinish() {
 				currentCustomer.placeItemsOnCounter();
 			}
 		});
-		// Move other customers forward in queue
+		// Move other customers forward in queue (right to left)
 		for (var i = 0; i < customerQueue.length; i++) {
-			var queuePos = 800 + i * 150;
+			var queuePos = 1224 - i * 150; // Reposition from right to left
 			tween(customerQueue[i], {
 				x: queuePos
 			}, {
 				duration: 1000