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

/**** 
* Classes
****/ 
// Branch asset
// Bird1 class to represent the first kind of bird
var Bird1 = Container.expand(function () {
	var self = Container.call(this);
	var birdGraphics = self.attachAsset('bird1', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = Math.random() * 1.6 + 1;
	self.lastY = self.y; // Initialize lastY for tracking changes on Y
	self.lastX = self.x; // Initialize lastX for tracking changes on X
	self.update = function () {
		self.y += self.speed;
		self.x += Math.sin(self.y / 100) * 6.5; // Increase the swooping motion of the bird's movement by 30%
		// Check if the bird has moved off-screen
		if (self.lastY <= 2732 && self.y > 2732) {
			self.y = -self.height;
			self.x = Math.random() * 2048; // Randomize the x position
			self.speed = Math.random() * 1.6 + 1; // Reset speed for new bird
		}
		if (self.lastX > self.x) {
			birdGraphics.texture = LK.getAsset('bird1b', {}).texture;
		} else if (self.lastX < self.x) {
			birdGraphics.texture = LK.getAsset('bird1', {}).texture;
		}
		self.lastY = self.y; // Update lastY after movement
		self.lastX = self.x; // Update lastX after movement
	};
});
// Bird2 class to represent the second kind of bird
var Bird2 = Container.expand(function () {
	var self = Container.call(this);
	var birdGraphics = self.attachAsset('bird2b', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = Math.random() * 1.6 + 1;
	self.lastY = self.y; // Initialize lastY for tracking changes on Y
	self.lastX = self.x; // Initialize lastX for tracking changes on X
	self.update = function () {
		self.y += self.speed;
		self.x += Math.sin(self.y / 100) * 6.5; // Increase the swooping motion of the bird's movement by 30%
		if (self.lastX <= 2048 / 2 && self.x > 2048 / 2) {
			birdGraphics.texture = LK.getAsset('bird2b', {}).texture;
		} else if (self.lastX > 2048 / 2 && self.x <= 2048 / 2) {
			birdGraphics.texture = LK.getAsset('bird2', {}).texture;
		}
		self.lastX = self.x; // Update lastX after movement
		// Check if the bird has moved off-screen
		if (self.lastY <= 2732 && self.y > 2732) {
			self.y = Math.random() * 2732; // Random initial y position within the screen height
			self.x = Math.random() < 0.5 ? 0 : 2048; // Start from either the left or right side
		}
		self.lastY = self.y; // Update lastY after movement
	};
});
// Bird3 class to represent a third kind of bird
var Bird3 = Container.expand(function () {
	var self = Container.call(this);
	var birdGraphics = self.attachAsset('bird2', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = Math.random() * 1.6 + 1;
	self.lastY = self.y; // Initialize lastY for tracking changes on Y
	self.lastX = self.x; // Initialize lastX for tracking changes on X
	self.update = function () {
		self.y += self.speed;
		self.x += Math.sin(self.y / 100) * 6.5; // Increase the swooping motion of the bird's movement by 30%
		// Check if the bird has moved off-screen
		if (self.lastY <= 2732 && self.y > 2732) {
			self.y = -self.height;
			self.x = Math.random() * 2048; // Randomize the x position
			self.speed = Math.random() * 1.6 + 1; // Reset speed for new bird
		}
		if (self.lastX <= 2048 / 2 && self.x > 2048 / 2) {
			birdGraphics.texture = LK.getAsset('bird2b', {}).texture;
		} else if (self.lastX > 2048 / 2 && self.x <= 2048 / 2) {
			birdGraphics.texture = LK.getAsset('bird2', {}).texture;
		}
		self.lastY = self.y; // Update lastY after movement
		self.lastX = self.x; // Update lastX after movement
	};
});
// Cat class to manage cat behavior
var Cat = Container.expand(function () {
	var self = Container.call(this);
	var catGraphics = self.attachAsset('cat', {
		anchorX: 0.5,
		anchorY: 1
	});
	self.update = function () {
		// Add any specific update logic for the cat here
	};
});
// Cloud class to represent clouds moving across the screen
var Cloud = Container.expand(function () {
	var self = Container.call(this);
	var cloudGraphics = self.attachAsset('cloud', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = (Math.random() * 0.3 + 0.7) * 0.4; // Adjust speed to vary slightly for each cloud
	self.hasAccelerated = false; // Track if the cloud has already accelerated
	self.direction = Math.random() < 0.5 ? 1 : -1; // Random direction: 1 for right, -1 for left
	self.lastX = self.x; // Track last X position for future checks
	self.lastIntersecting = false; // Initialize lastIntersecting for tracking changes on intersections
	self.update = function () {
		self.x += self.speed * self.direction;
		// If the cloud moves off-screen, reposition it to the opposite side
		if (self.lastX <= 2048 + self.width / 2 && self.x > 2048 + self.width / 2) {
			self.x = -self.width / 2;
		} else if (self.lastX >= -self.width / 2 && self.x < -self.width / 2) {
			self.x = 2048 + self.width / 2;
		}
		// Check for overlap with other clouds
		for (var i = 0; i < clouds.length; i++) {
			if (clouds[i] !== self && self.intersects(clouds[i])) {
				if (!self.hasAccelerated) {
					self.speed *= 1.5; // Increase speed by 50%
					self.hasAccelerated = true; // Mark as accelerated
				}
				break;
			} else if (self.hasAccelerated && !self.intersects(clouds[i])) {
				self.speed /= 1.5; // Reset speed to original
				self.hasAccelerated = false; // Reset acceleration state
			}
		}
		// Check if the cloud intersects with the sun
		if (!self.lastIntersecting && self.intersects(sun)) {
			self.speed *= 1.5; // Increase speed by 50%
			tween(cloudGraphics, {
				alpha: 0.5
			}, {
				duration: 3000,
				easing: tween.linear
			});
		} else if (self.lastIntersecting && !self.intersects(sun)) {
			self.speed /= 1.5; // Reset speed to original
			tween(cloudGraphics, {
				alpha: 1.0
			}, {
				duration: 3000,
				easing: tween.linear
			});
		}
		self.lastIntersecting = self.intersects(sun);
		self.lastX = self.x; // Update lastX after movement
	};
});
// Grass class to represent the grass image
var Grass = Container.expand(function () {
	var self = Container.call(this);
	var grassGraphics = self.attachAsset('grass', {
		anchorX: 0.5,
		anchorY: 1
	});
	self.update = function () {
		// Add any specific update logic for the grass here
		// Example: Slightly move the grass to simulate wind effect
		self.x += Math.sin(LK.ticks / 100) * 0.125; // Swaying effect, reduced by 50%
	};
});
// Laser class to represent a laser shot from the cat
var Laser = Container.expand(function (startX, startY, targetX, targetY) {
	var self = Container.call(this);
	var laserGraphics = self.attachAsset('laser1', {
		anchorX: 0.5,
		anchorY: 0.5,
		brightness: 2.0 // Increase brightness by 200%
	});
	// Play the laser1 sound when the laser is created
	LK.getSound('laser1').play();
	// Calculate direction and speed
	var dx = targetX - startX;
	var dy = targetY - startY;
	var distance = Math.sqrt(dx * dx + dy * dy);
	var speed = 60; // Speed of the laser increased by 200%
	self.vx = dx / distance * speed;
	self.vy = dy / distance * speed;
	// Set initial position
	self.x = startX;
	self.y = startY;
	// Update function to move the laser
	self.update = function () {
		self.x += self.vx;
		self.y += self.vy;
		// Remove laser if it goes off-screen
		if (self.x < 0 || self.x > 2048 || self.y < 0 || self.y > 2732) {
			self.destroy();
		}
	};
});
// Reticle class to manage reticle behavior
var Reticle = Container.expand(function () {
	var self = Container.call(this);
	var reticleGraphics = self.attachAsset('reticle1', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.update = function () {
		// Add any specific update logic for the reticle here
	};
});
// ScoreDisplay class to manage score display
var ScoreDisplay = Container.expand(function () {
	var self = Container.call(this);
	var scoreGraphics = self.attachAsset('scoreImage', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	var scoreText = new Text2('0', {
		size: 175,
		fill: 0x00FF00,
		font: "Digital-7 Mono",
		// Segmented clock style font
		stroke: 0x000000,
		strokeThickness: 5,
		dropShadow: true,
		dropShadowColor: 0x000000,
		dropShadowBlur: 5,
		dropShadowAngle: Math.PI / 6,
		dropShadowDistance: 6
	});
	scoreText.y = -118; // Move score text up by 10px
	scoreText.x = -135; // Move score text right by 10px
	self.addChild(scoreText);
	self.updateScore = function (newScore) {
		scoreText.setText(newScore);
	};
});
// ScoreManager class to manage score logic
// ScoreManager class to manage score logic
// Sun class to represent a pulsating sun in the top right corner
var Sun = Container.expand(function () {
	var self = Container.call(this);
	var sunGraphics = self.attachAsset('sun', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.x = sunGraphics.width / 2;
	self.y = sunGraphics.height / 2;
	// Function to create a pulsating effect
	function pulsate() {
		tween(self, {
			scaleX: 1.1,
			scaleY: 1.1
		}, {
			duration: 1000,
			easing: tween.easeInOut,
			onFinish: function onFinish() {
				tween(self, {
					scaleX: 1.0,
					scaleY: 1.0
				}, {
					duration: 1000,
					easing: tween.easeInOut,
					onFinish: pulsate
				});
			}
		});
	}
	pulsate(); // Start the pulsating effect
});
// Tree class to represent a tree with a 9:16 aspect ratio
var Tree = Container.expand(function () {
	var self = Container.call(this);
	var treeGraphics = self.attachAsset('tree', {
		anchorX: 0.5,
		anchorY: 1
	});
	self.update = function () {
		// Add any specific update logic for the tree here
	};
});
// UFO class to represent a UFO flying across the screen
var UFO = Container.expand(function () {
	var self = Container.call(this);
	var ufoGraphics = self.attachAsset('ufo', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 3.2; // Decrease speed by 20%
	self.direction = Math.random() < 0.5 ? 1 : -1; // Random direction: 1 for right, -1 for left
	self.lastX = self.x; // Track last X position for future checks
	self.update = function () {
		self.x += self.speed * self.direction;
		self.y = 100 + Math.sin(self.x / 70) * 165; // Increase the wave pattern depth by 10%
		// If the UFO moves off-screen, destroy it and set to null
		if (self.lastX <= 2048 + self.width / 2 && self.x > 2048 + self.width / 2 || self.lastX >= -self.width / 2 && self.x < -self.width / 2) {
			self.destroy();
			ufo = null;
		}
		self.lastX = self.x; // Update lastX after movement
	};
});

/**** 
* Initialize Game
****/ 
/**** 
* Assets
LK.init.shape('branch', {width:50, height:10, color:0x8b4513, shape:'box'})
****/ 
// Initialize clouds array
var game = new LK.Game({
	// No title, no description
	backgroundColor: 0x87CEEB // Sky blue
});

/**** 
* Game Code
****/ 
// Create an array to hold bird objects
// ScoreManager class to manage score logic
// ScoreManager class to manage score logic
var ScoreManager = function ScoreManager() {
	var self = this;
	self.score = 0;
	self.addScore = function (points) {
		self.score += points;
		return self.score;
	};
	self.resetScore = function () {
		self.score = 0;
	};
	self.getScore = function () {
		return self.score;
	};
};
var birds = [];
// bird1
// Initialize with 3 birds
function spawnBird1() {
	var bird = new Bird1();
	bird.x = Math.random() * 2048;
	bird.y = -bird.height;
	bird.speed = 1 + Math.random() * 0.6;
	bird.lastIntersecting = false;
	bird.type = 'Bird1'; // Specific property for Bird1
	bird.color = 0x746130; // Specific color for Bird1
	LK.setTimeout(function () {
		game.addChild(bird);
		game.setChildIndex(bird, 5); // Set Bird1 to be rendered after the laser
		birds.push(bird);
	}, 2000);
}
spawnBird1();
// Add the cat to the game
var cat = game.addChild(new Cat());
cat.x = 2048 - 200; // Position the cat to the far right
cat.y = 2732; // Position the cat at the bottom of the screen
game.down = function (x, y, obj) {
	if (!game.reticle) {
		game.reticle = game.addChild(new Reticle());
		game.setChildIndex(game.reticle, 1); // Set reticle to be rendered after the background
	}
	game.reticle.x = x;
	game.reticle.y = y;
	var laser = new Laser(cat.x, cat.y, x, y);
	game.addChild(laser);
	game.setChildIndex(laser, game.getChildIndex(game.reticle) + 1); // Ensure laser is rendered after the reticle
	// Create a list in the bottom left of the screen that lists current ChildIndex objects in index order
	var childIndexList = new Text2('', {
		size: 50,
		fill: 0xFFFFFF,
		anchorX: 0,
		anchorY: 1
	});
	childIndexList.x = 0;
	childIndexList.y = 2732;
	LK.gui.bottomLeft.addChild(childIndexList);
	function updateChildIndexList() {
		var listText = '';
		game.children.forEach(function (child, index) {
			listText += 'Index ' + index + ': ' + child.constructor.name + '\n';
		});
		childIndexList.setText(listText);
	}
	game.update = function () {
		updateChildIndexList();
		for (var i = 0; i < clouds.length; i++) {}
		;
		var VOLUME_BGM1 = 0.02;
		var VOLUME_BREEZE1 = 0.02;
		var VOLUME_CRICKET1 = 0.02;
		var VOLUME_FROG1 = 0.02;
		var VOLUME_SONGBIRD1 = 0.02;
		var VOLUME_UFO1 = 0.02;
		var VOLUME_WINGS1 = 0.02;
		game.move = function (x, y, obj) {
			if (!game.reticle) {
				game.reticle = game.addChild(new Reticle());
			}
			if (obj.event) {
				var x = obj.event.x;
				var y = obj.event.y;
			}
			game.reticle.x = x;
			game.reticle.y = y;
		};
		// Add a sun to the game in the top left corner
		var sun = game.addChild(new Sun());
		sun.x = 1750;
		sun.y = 280;
		game.setChildIndex(sun, 1); // Set sun to be rendered after the background
		// Function to add a UFO to the game
		function addUFO() {
			var ufo = game.addChild(new UFO());
			ufo.x = Math.random() < 0.5 ? 2048 + ufo.width / 2 : -ufo.width / 2; // Start from either the far right or left edge of the screen
			ufo.y = Math.random() * 500; // Random initial y position in the upper part of the screen
			ufo.customUpdate = function () {
				ufo.update();
			};
			// Removed ufo sound playing at startup
			return ufo;
		}
		// Initialize clouds array
		var clouds = [];
		for (var i = 0; i < 4; i++) {
			// Add 3 clouds for variety
			var cloud = new Cloud();
			cloud.x = Math.random() * 2048;
			cloud.y = Math.random() * 500; // Position clouds in the upper part of the screen
			clouds.push(cloud);
			game.addChild(cloud);
			game.setChildIndex(cloud, 2); // Set clouds to be rendered after the sun
		}
		// Initialize a timer to add a UFO at a random time between 30 and 50 seconds
		var ufo; // Define the ufo variable in the global scope
		var ufoTimer = LK.setTimeout(function () {
			addUFO();
		}, Math.random() * 20000 + 30000);
		clouds[i].update();
	};
	if (ufo) {
		ufo.customUpdate();
		// Update each laser
		game.children.forEach(function (child) {
			if (child instanceof Laser) {
				child.update();
				// Removed collision detection code for laser and birds
			}
		});
		// Removed collision detection code for UFO
	}
	// Function to spawn a third kind of bird
	function spawnBird1() {
		var bird = new Bird1();
		bird.x = Math.random() * 2048;
		bird.y = -bird.height;
		bird.speed = 1 + Math.random() * 0.6;
		bird.lastIntersecting = false;
		bird.type = 'Bird1'; // Specific property for Bird1
		bird.color = 0x746130; // Specific color for Bird1
		LK.setTimeout(function () {
			game.addChild(bird);
			game.setChildIndex(bird, 5); // Set Bird1 to be rendered after the laser
			birds.push(bird);
		}, 2000);
	}
	function spawnBird2() {
		var bird = new Bird2();
		bird.y = Math.random() * 2732; // Random initial y position within the screen height
		bird.x = Math.random() < 0.5 ? 0 : 2048; // Start from either the left or right side
		bird.speed = 1 + Math.random() * 0.6;
		bird.lastIntersecting = false;
		bird.type = 'Bird2'; // Specific property for Bird2
		bird.color = 0xFFFFFF; // Specific color for Bird2
		LK.setTimeout(function () {
			game.addChild(bird);
			game.setChildIndex(bird, 7); // Set Bird2 to be rendered after the tree
			birds.push(bird);
		}, 2000);
	}
	function spawnBird3() {
		var bird = new Bird3();
		bird.y = Math.random() * 2732; // Random initial y position within the screen height
		bird.x = Math.random() < 0.5 ? 0 : 2048; // Start from either the left or right side
		bird.speed = 1 + Math.random() * 0.6;
		bird.lastIntersecting = false;
		bird.type = 'Bird3'; // Specific property for Bird3
		bird.color = 0xFF0000; // Specific color for Bird3
		LK.setTimeout(function () {
			game.addChild(bird);
			game.setChildIndex(bird, 7); // Set Bird3 to be rendered after Bird2
			birds.push(bird);
		}, 2000);
	}
	// Ensure there are always 3 birds on screen
	// Update each bird
	birds.forEach(function (bird) {
		bird.update();
		// Check if the bird has moved off-screen
		if (bird.lastY <= 2732 && bird.y > 2732) {
			bird.y = -bird.height; // Respawn the bird at the top
			bird.x = Math.random() * 2048; // Randomize the x position
			bird.speed = 1 + Math.random() * 0.6; // Reset speed for new bird
		}
	});
};
// Add a tree to the game
var tree = game.addChild(new Tree());
tree.x = 2048 / 2; // Center the tree to prevent it from being cut off on the right side
tree.y = 2732 - 50; // Position the tree on the grass
game.setChildIndex(tree, Math.min(6, game.children.length - 1)); // Set tree to be rendered after Bird1
var score = 0;
// Add the grass floor to the game
spawnBird2();
spawnBird3();
var grass = new Grass();
grass.x = 1020;
grass.y = 2735; // Position grass at the bottom
game.addChild(grass);
game.setChildIndex(grass, Math.min(9, game.children.length - 1)); // Set grass to be rendered after Bird3
var scoreDisplay = new ScoreDisplay();
scoreDisplay.x = 2048 / 2; // Center the score display horizontally
scoreDisplay.y = 2732 - 185; // Adjust the y-coordinate of the score display
game.addChild(scoreDisplay);
game.setChildIndex(scoreDisplay, game.getChildIndex(grass) + 1); // Set score image to be rendered after the grass
// Add the cat to the game
// Function to handle bgm1 end event
function onBgm1End() {
	// Set a timer to replay bgm1 after 20-50 seconds
	var bgmTimer = LK.setTimeout(function () {
		LK.playMusic('bgm1', {
			loop: false,
			// Play once
			fade: {
				start: 0,
				end: 0.02,
				// Set to the lowest volume
				duration: 4000
			},
			onEnd: onBgm1End
		});
	}, Math.random() * 30000 + 20000); // Random time between 20-50 seconds
}
LK.playMusic('bgm1', {
	loop: false,
	// Play once
	fade: {
		start: 0,
		end: 0.02,
		// Set to the lowest volume
		duration: 4000
	},
	onEnd: onBgm1End
});
// Initialize a timer to play the wings1 sound at a random time between 10 and 30 seconds
var wingsTimer = LK.setTimeout(function () {
	LK.getSound('wings1').play();
	wingsTimer = LK.setTimeout(arguments.callee, Math.random() * 20000 + 10000);
}, Math.random() * 20000 + 10000);
// Create an array for all sounds except ufo1, including all birdsong sounds
var sounds = ['cricket1', 'frog1', 'wings1', 'songbird1'];
var currentAmbientSound = null;
// Initialize random timers for each sound to play between 30-50 seconds
sounds.forEach(function (soundId) {
	var sound = LK.getSound(soundId);
	var ambientSoundTimer = LK.setTimeout(function () {
		if (currentAmbientSound) {
			currentAmbientSound.stop(); // Stop the currently playing ambient sound
		}
		sound.play();
		currentAmbientSound = sound; // Set the current ambient sound
		// Set a timeout to reset the current ambient sound after it finishes playing
		LK.setTimeout(function () {
			currentAmbientSound = null;
		}, sound.duration * 1000); // Convert duration from seconds to milliseconds
		// Reset the timer to play the sound again between 30-50 seconds, plus an additional 5 seconds
		ambientSoundTimer = LK.setTimeout(arguments.callee, Math.random() * 20000 + 30000 + 5000);
	}, Math.random() * 20000 + 30000);
});

===================================================================
--- original.js
+++ change.js
@@ -510,9 +510,9 @@
 // Add a tree to the game
 var tree = game.addChild(new Tree());
 tree.x = 2048 / 2; // Center the tree to prevent it from being cut off on the right side
 tree.y = 2732 - 50; // Position the tree on the grass
-game.setChildIndex(tree, 6); // Set tree to be rendered after Bird1
+game.setChildIndex(tree, Math.min(6, game.children.length - 1)); // Set tree to be rendered after Bird1
 var score = 0;
 // Add the grass floor to the game
 spawnBird2();
 spawnBird3();