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

/**** 
* Classes
****/ 
// Branch asset
// Bird 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.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.y > 2732) {
			self.y = -self.height;
			if (Math.random() < 0.33) {
				self.x = Math.random() * 2048; // Start from a random position along the top
			} else {
				self.x = Math.random() < 0.5 ? 0 : 2048; // Start from either the left or right side
			}
		}
	};
});
// Bird2 class to represent the second kind of bird
var Bird2 = 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.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.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
		}
	};
});
// Bird3 class to represent a third kind of bird
var Bird3 = 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.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.y > 2732) {
			self.y = -self.height;
			if (Math.random() < 0.33) {
				self.x = Math.random() * 2048; // Start from a random position along the top
			} else {
				self.x = Math.random() < 0.5 ? 0 : 2048; // Start from either the left or right side
			}
		}
	};
});
// 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() * 0.5 + 0.5) * 0.4; // Reduce speed by 60% (20% slower than before)
	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.update = function () {
		self.x += self.speed * self.direction;
		// If the cloud moves off-screen, reposition it to the opposite side
		if (self.x > 2048 + self.width / 2) {
			self.x = -self.width / 2;
		} else if (self.x < -self.width / 2) {
			self.x = 2048 + self.width / 2;
		}
		self.lastX = self.x; // Track last X position for future checks
		// 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) {
					var slowestSpeed = Math.min(self.speed, clouds[i].speed);
					self.speed += slowestSpeed * 0.1; // Increase speed by 10% of the slowest cloud's speed
					self.hasAccelerated = true; // Mark as accelerated
				}
				break;
			}
		}
		// 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);
	};
});
// Sun class to represent a pulsating sun in the top left 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.update = function () {
		self.x += self.speed * self.direction;
		self.y = 100 + Math.sin(self.x / 100) * 350; // Increase the wave pattern length to make the UFO move along the top 100px-700px
		// If the UFO moves off-screen, destroy it and set to null
		if (self.x > 2048 + self.width / 2 || self.x < -self.width / 2) {
			self.destroy();
			ufo = null;
		}
	};
});

/**** 
* Initialize Game
****/ 
/**** 
* Assets
LK.init.shape('branch', {width:50, height:10, color:0x8b4513, shape:'box'})
****/ 
// Initialize clouds array
var game = new LK.Game({
	backgroundColor: 0x87CEEB // Light blue background to simulate the sky
});

/**** 
* Game Code
****/ 
// Create a text block named block1 to display a message on the screen
var block1 = new Text2('Welcome', {
	size: 120,
	fill: 0xFFFF00,
	// Pure red color
	// White color
	font: "Showcard Gothic",
	// Simple and readable font
	stroke: 0xFFFF00,
	// Outline with a thin black line
	strokeThickness: 5,
	// Thickness of the outline
	dropShadow: true,
	// Enable drop shadow
	dropShadowColor: 0x000000,
	// Black shadow
	dropShadowBlur: 4,
	// Blur level of the shadow
	dropShadowAngle: Math.PI / 6,
	// Angle of the shadow
	dropShadowDistance: 6 // Distance of the shadow from the text
});
block1.anchor.set(0.5, 0.5); // Center the text
block1.scale.x = Math.min(1, 2048 * 0.5 / block1.width); // Ensure width is at most 50% of screen width
block1.x = 2048 / 2 - block1.size; // Move left by 1500px, then right by 500px, and finally left by 50px, then right by 50px, then left by 10px, then left by 100px
block1.y = 2732 / 2 - 400; // Move up by 400px
block1.visible = false; // Hide block1
LK.gui.top.addChild(block1);
// Function to create a pulsating effect for block1
function bounceBlock1() {
	tween(block1, {
		y: block1.y - 20
	}, {
		duration: 500,
		easing: tween.easeOut,
		onFinish: function onFinish() {
			tween(block1, {
				y: block1.y + 20
			}, {
				duration: 500,
				easing: tween.easeIn,
				onFinish: bounceBlock1
			});
		}
	});
}
bounceBlock1(); // Start the bouncing effect for block1
game.move = function (x, y, obj) {
	// Removed the cat image from following the cursor
	if (!game.reticle) {
		game.reticle = LK.getAsset('reticle1', {
			anchorX: 0.5,
			anchorY: 0.5
		});
		game.addChild(game.reticle);
	}
	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;
// 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();
	};
	LK.getSound('ufo1').play();
	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);
}
// Initialize a timer to add a UFO at a random time between 30 and 90 seconds
var ufo; // Define the ufo variable in the global scope
var ufoTimer = LK.setTimeout(function () {
	addUFO();
	// Reset the timer with a new random time
	ufoTimer = LK.setTimeout(arguments.callee, Math.random() * 60000 + 30000);
}, Math.random() * 60000 + 30000);
game.update = function () {
	for (var i = 0; i < clouds.length; i++) {
		clouds[i].update();
	}
	if (ufo) {
		ufo.customUpdate();
		// Check if the UFO has moved off-screen
		if (ufo.lastX <= 2048 + ufo.width / 2 && ufo.x > 2048 + ufo.width / 2 || ufo.lastX >= -ufo.width / 2 && ufo.x < -ufo.width / 2) {
			// Destroy the UFO and set it to null
			ufo.destroy();
			ufo = null;
			// Stop the ufo1 sound
			LK.getSound('ufo1').stop();
			// Start a timer for the UFO to reappear between 50-80 seconds
			ufoTimer = LK.setTimeout(function () {
				ufo = addUFO();
			}, Math.random() * 30000 + 50000);
		} else {
			// Ensure the ufo1 sound is playing while the UFO is on screen
			if (!LK.getSound('ufo1').isPlaying()) {
				LK.getSound('ufo1').play({
					loop: true
				});
			}
		}
		ufo.lastX = ufo.x; // Update lastX for the UFO
	}
	bird1.update();
	bird2.update();
	if (!bird1.lastIntersecting && bird1.intersects(bird2)) {
		var dx = bird2.x - bird1.x;
		var dy = bird2.y - bird1.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		var minDist = (bird1.width + 10) / 2 + (bird2.width + 10) / 2;
		if (distance < minDist) {
			var angle = Math.atan2(dy, dx);
			var targetX = bird1.x + Math.cos(angle) * minDist;
			var targetY = bird1.y + Math.sin(angle) * minDist;
			var ax = (targetX - bird2.x) * 0.02;
			var ay = (targetY - bird2.y) * 0.02;
			bird1.x -= ax;
			bird1.y -= ay;
			bird2.x += ax;
			bird2.y += ay;
			// Slow down both birds by 20%
			bird1.speed *= 0.8;
			bird2.speed *= 0.8;
		}
		bird1.lastIntersecting = true;
		bird2.lastIntersecting = true;
	} else {
		bird1.lastIntersecting = false;
		bird2.lastIntersecting = false;
	}
};
// Create two separate bird objects
var bird1 = new Bird1();
bird1.x = Math.random() * 2048;
bird1.y = -bird1.height;
bird1.speed = 1 + Math.random() * 0.6;
bird1.lastIntersecting = false;
game.addChild(bird1);
// bird1
// 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
// No need to create branches here as they are created in the Tree class
var score = 0;
var scoreTxt = new Text2('Score: 0', {
	size: 100,
	fill: 0x00FF00,
	// Monochrome green color
	font: "Showcard Gothic",
	// Fun and playful font
	stroke: 0x000000,
	// Outline with a thin black line 
	strokeThickness: 5,
	// Thickness of the outline
	dropShadow: true,
	// Enable drop shadow
	dropShadowColor: 0x000000,
	// Black shadow
	dropShadowBlur: 5,
	// Blur level of the shadow
	dropShadowAngle: Math.PI / 6,
	// Angle of the shadow
	dropShadowDistance: 6 // Distance of the shadow from the text
});
var bird2 = new Bird2();
bird2.x = Math.random() * 2048;
bird2.y = -bird2.height;
bird2.speed = 1 + Math.random() * 0.6;
bird2.lastIntersecting = false;
game.addChild(bird2);
LK.gui.top.addChild(scoreTxt);
// Add the grass floor to the game
for (var i = 0; i < 2048; i += 2048) {
	for (var j = 0; j < 2048; j += 2048) {
		var grass = game.addChild(LK.getAsset('grass', {
			anchorX: 0.5,
			anchorY: 1,
			x: j + 2048 / 2,
			y: 2732
		}));
	}
}
// Add the cat to the game
var cat = game.addChild(LK.getAsset('cat', {
	anchorX: 0.5,
	anchorY: 1,
	x: 2048 - 200,
	// Position the cat to the far right
	y: 2732 // Position the cat at the bottom of the screen
}));
// Function to handle bgm1 end event
function onBgm1End() {
	// Set a timer to replay bgm1 after 50-80 seconds
	var bgmTimer = LK.setTimeout(function () {
		LK.playMusic('bgm1', {
			loop: false,
			fade: {
				start: 0,
				end: 1,
				duration: 4000
			},
			onEnd: onBgm1End
		});
	}, Math.random() * 30000 + 50000);
}
// Play bgm1 once at the start of the game
LK.playMusic('bgm1', {
	loop: true,
	fade: {
		start: 0,
		end: 1,
		duration: 4000
	}
});
// Initialize a timer to play the wings1 sound at a random time between 10 and 30 seconds
var soundTimer = LK.setTimeout(function () {
	LK.getSound('wings1').play();
	soundTimer = LK.setTimeout(arguments.callee, Math.random() * 20000 + 10000);
}, Math.random() * 20000 + 10000);
// Create an array for all sounds except ufo1
var sounds = ['cricket1', 'cricket2', 'frog1', 'wings1'];
// Initialize random timers for each sound to play between 50-80 seconds
sounds.forEach(function (soundId) {
	var sound = LK.getSound(soundId);
	var soundTimer = LK.setTimeout(function () {
		sound.play();
		// Reset the timer to play the sound again between 50-80 seconds
		soundTimer = LK.setTimeout(arguments.callee, Math.random() * 30000 + 50000);
	}, Math.random() * 30000 + 50000);
});

===================================================================
--- original.js
+++ change.js
@@ -416,15 +416,14 @@
 	}, Math.random() * 30000 + 50000);
 }
 // Play bgm1 once at the start of the game
 LK.playMusic('bgm1', {
-	loop: false,
+	loop: true,
 	fade: {
 		start: 0,
 		end: 1,
 		duration: 4000
-	},
-	onEnd: onBgm1End
+	}
 });
 // Initialize a timer to play the wings1 sound at a random time between 10 and 30 seconds
 var soundTimer = LK.setTimeout(function () {
 	LK.getSound('wings1').play();