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

/**** 
* Classes
****/ 
var Block = Container.expand(function (blockType) {
	var self = Container.call(this);
	self.blockType = blockType || 'block_I';
	self.gridX = 0;
	self.gridY = 0;
	var blockGraphics = self.attachAsset(self.blockType, {
		anchorX: 0,
		anchorY: 0
	});
	self.setGridPosition = function (gridX, gridY) {
		self.gridX = gridX;
		self.gridY = gridY;
		self.x = GRID_OFFSET_X + gridX * BLOCK_SIZE;
		self.y = GRID_OFFSET_Y + gridY * BLOCK_SIZE;
	};
	return self;
});
var Tetromino = Container.expand(function (type) {
	var self = Container.call(this);
	self.type = type || 'I';
	self.rotation = 0;
	self.gridX = 7; // Start in middle of board
	self.gridY = 0;
	self.blocks = [];
	self.fallTimer = 0;
	self.fallSpeed = 80; // Frames until next fall (faster falling speed) 
	self.isPlaced = false; // Prevent multiple placement calls
	// Tetromino shapes and rotations
	self.shapes = {
		'I': [[[1, 1, 1, 1]], [[1], [1], [1], [1]], [[1, 1, 1, 1]], [[1], [1], [1], [1]]],
		'O': [[[1, 1], [1, 1]], [[1, 1], [1, 1]], [[1, 1], [1, 1]], [[1, 1], [1, 1]]],
		'T': [[[0, 1, 0], [1, 1, 1]], [[1, 0], [1, 1], [1, 0]], [[1, 1, 1], [0, 1, 0]], [[0, 1], [1, 1], [0, 1]]],
		'S': [[[0, 1, 1], [1, 1, 0]], [[1, 0], [1, 1], [0, 1]], [[0, 1, 1], [1, 1, 0]], [[1, 0], [1, 1], [0, 1]]],
		'Z': [[[1, 1, 0], [0, 1, 1]], [[0, 1], [1, 1], [1, 0]], [[1, 1, 0], [0, 1, 1]], [[0, 1], [1, 1], [1, 0]]],
		'J': [[[1, 0, 0], [1, 1, 1]], [[1, 1], [1, 0], [1, 0]], [[1, 1, 1], [0, 0, 1]], [[0, 1], [0, 1], [1, 1]]],
		'L': [[[0, 0, 1], [1, 1, 1]], [[1, 0], [1, 0], [1, 1]], [[1, 1, 1], [1, 0, 0]], [[1, 1], [0, 1], [0, 1]]]
	};
	self.getBlockType = function () {
		// Map each tetromino type to its corresponding block asset
		var blockTypeMap = {
			'I': 'block_I',
			'O': 'block_O',
			'T': 'block_T',
			'S': 'block_S',
			'Z': 'block_Z',
			'J': 'block_J',
			'L': 'block_L'
		};
		return blockTypeMap[self.type] || 'block_I';
	};
	self.createBlocks = function () {
		// Clear existing blocks
		for (var i = 0; i < self.blocks.length; i++) {
			self.blocks[i].destroy();
		}
		self.blocks = [];
		// Ensure we have a valid shape for this type
		if (!self.shapes[self.type]) {
			console.error('Invalid tetromino type:', self.type);
			return;
		}
		var shape = self.shapes[self.type][self.rotation];
		var blockType = self.getBlockType();
		for (var y = 0; y < shape.length; y++) {
			for (var x = 0; x < shape[y].length; x++) {
				if (shape[y][x] === 1) {
					var block = new Block(blockType);
					block.setGridPosition(self.gridX + x, self.gridY + y);
					self.blocks.push(block);
					game.addChild(block);
				}
			}
		}
	};
	self.updatePosition = function () {
		var shape = self.shapes[self.type][self.rotation];
		var blockIndex = 0;
		for (var y = 0; y < shape.length; y++) {
			for (var x = 0; x < shape[y].length; x++) {
				if (shape[y][x] === 1) {
					if (blockIndex < self.blocks.length) {
						self.blocks[blockIndex].setGridPosition(self.gridX + x, self.gridY + y);
					}
					blockIndex++;
				}
			}
		}
	};
	self.canMoveTo = function (newX, newY, newRotation) {
		var testRotation = newRotation !== undefined ? newRotation : self.rotation;
		var shape = self.shapes[self.type][testRotation];
		for (var y = 0; y < shape.length; y++) {
			for (var x = 0; x < shape[y].length; x++) {
				if (shape[y][x] === 1) {
					var checkX = newX + x;
					var checkY = newY + y;
					// Check bounds
					if (checkX < 0 || checkX >= GRID_WIDTH || checkY >= GRID_HEIGHT) {
						return false;
					}
					// Check collision with placed blocks
					if (checkY >= 0 && gameGrid[checkY] && gameGrid[checkY][checkX]) {
						return false;
					}
				}
			}
		}
		return true;
	};
	self.move = function (deltaX, deltaY) {
		if (self.canMoveTo(self.gridX + deltaX, self.gridY + deltaY)) {
			self.gridX += deltaX;
			self.gridY += deltaY;
			self.updatePosition();
			return true;
		}
		return false;
	};
	self.rotate = function () {
		var newRotation = (self.rotation + 1) % 4;
		if (self.canMoveTo(self.gridX, self.gridY, newRotation)) {
			self.rotation = newRotation;
			self.updatePosition();
			LK.getSound('piece_rotate').play();
			return true;
		}
		return false;
	};
	self.update = function () {
		self.fallTimer++;
		if (self.fallTimer >= self.fallSpeed) {
			self.fallTimer = 0;
			if (!self.move(0, 1)) {
				// Piece has landed
				self.placePiece();
			}
		}
	};
	self.placePiece = function () {
		// Prevent multiple calls
		if (self.isPlaced) return;
		self.isPlaced = true;
		// Add blocks to grid and create sparkle effects
		for (var i = 0; i < self.blocks.length; i++) {
			var block = self.blocks[i];
			if (block.gridY >= 0) {
				if (!gameGrid[block.gridY]) gameGrid[block.gridY] = [];
				gameGrid[block.gridY][block.gridX] = block;
				// Create sparkle effect around the block
				var sparkleCount = 8;
				for (var j = 0; j < sparkleCount; j++) {
					var sparkle = LK.getAsset('grid_border', {
						x: block.x + BLOCK_SIZE / 2,
						y: block.y + BLOCK_SIZE / 2,
						scaleX: 0.5,
						scaleY: 0.5,
						alpha: 1
					});
					game.addChild(sparkle);
					// Random sparkle position around block
					var angle = j / sparkleCount * Math.PI * 2;
					var distance = BLOCK_SIZE * 0.7;
					var targetX = sparkle.x + Math.cos(angle) * distance;
					var targetY = sparkle.y + Math.sin(angle) * distance;
					// Animate sparkle outward and fade
					tween(sparkle, {
						x: targetX,
						y: targetY,
						alpha: 0,
						scaleX: 0.1,
						scaleY: 0.1
					}, {
						duration: 300,
						easing: tween.easeOut,
						onFinish: function onFinish() {
							if (sparkle && sparkle.destroy) {
								sparkle.destroy();
							}
						}
					});
				}
			}
		}
		// Remove blocks from this tetromino since they're now part of the grid
		self.blocks = [];
		LK.getSound('piece_drop').play();
		checkCompleteLines();
		// Clear current piece reference first
		currentPiece = null;
		// Spawn new piece with a small delay to ensure proper sequencing
		LK.setTimeout(function () {
			spawnNewPiece();
		}, 50);
	};
	self.destroy = function () {
		// Clean up all blocks when tetromino is destroyed
		for (var i = 0; i < self.blocks.length; i++) {
			if (self.blocks[i] && self.blocks[i].destroy) {
				self.blocks[i].destroy();
			}
		}
		self.blocks = [];
		// Call parent destroy
		Container.prototype.destroy.call(self);
	};
	return self;
});

/**** 
* Initialize Game
****/ 
// Game constants
var game = new LK.Game({
	backgroundColor: 0x000000
});

/**** 
* Game Code
****/ 
// Game constants
// Tetromino blocks - using different colors for each piece type
// Cyan
// Yellow  
// Purple
// Green
// Red
// Blue
// Orange
var GRID_WIDTH = 14;
var GRID_HEIGHT = 24;
var BLOCK_SIZE = 100;
var GRID_OFFSET_X = (2048 - GRID_WIDTH * BLOCK_SIZE) / 2;
var GRID_OFFSET_Y = 100;
// Game variables
var gameGrid = [];
var currentPiece = null;
var nextPieceType = null;
var gameLevel = 1;
var linesCleared = 0;
var lastMoveTime = 0;
var moveDelay = 100; // Milliseconds between moves
// Initialize grid
for (var y = 0; y < GRID_HEIGHT; y++) {
	gameGrid[y] = [];
	for (var x = 0; x < GRID_WIDTH; x++) {
		gameGrid[y][x] = null;
	}
}
// Tetromino types
var pieceTypes = ['I', 'O', 'T', 'S', 'Z', 'J', 'L'];
function getRandomPieceType() {
	return pieceTypes[Math.floor(Math.random() * pieceTypes.length)];
}
function spawnNewPiece() {
	// Don't spawn if there's already an active piece or if one is being placed
	if (currentPiece && !currentPiece.isPlaced) {
		return;
	}
	if (!nextPieceType) {
		nextPieceType = getRandomPieceType();
	}
	// Create new piece and set as current immediately to prevent double spawning
	var newPiece = new Tetromino(nextPieceType);
	currentPiece = newPiece;
	game.addChild(currentPiece);
	currentPiece.createBlocks();
	nextPieceType = getRandomPieceType();
	// Check game over
	if (!currentPiece.canMoveTo(currentPiece.gridX, currentPiece.gridY)) {
		LK.showGameOver();
		return;
	}
}
function checkCompleteLines() {
	var completedLines = [];
	// Find completed lines
	for (var y = 0; y < GRID_HEIGHT; y++) {
		var lineComplete = true;
		for (var x = 0; x < GRID_WIDTH; x++) {
			if (!gameGrid[y][x]) {
				lineComplete = false;
				break;
			}
		}
		if (lineComplete) {
			completedLines.push(y);
		}
	}
	if (completedLines.length > 0) {
		// Sort completed lines from bottom to top (highest Y to lowest Y)
		// This ensures we process lines from bottom up, keeping indices valid
		completedLines.sort(function (a, b) {
			return b - a;
		});
		// Remove completed lines
		for (var i = 0; i < completedLines.length; i++) {
			var lineY = completedLines[i];
			// Create particle explosion effect for this line
			for (var x = 0; x < GRID_WIDTH; x++) {
				if (gameGrid[lineY][x]) {
					var block = gameGrid[lineY][x];
					// Create explosion effect before destroying
					var originalX = block.x;
					var originalY = block.y;
					var originalScaleX = block.scaleX;
					var originalScaleY = block.scaleY;
					var originalAlpha = block.alpha;
					// Random direction for explosion
					var randomX = originalX + (Math.random() - 0.5) * 400;
					var randomY = originalY + (Math.random() - 0.5) * 200;
					// Animate block flying away and fading
					tween(block, {
						x: randomX,
						y: randomY,
						scaleX: originalScaleX * 0.2,
						scaleY: originalScaleY * 0.2,
						alpha: 0,
						rotation: (Math.random() - 0.5) * Math.PI * 2
					}, {
						duration: 30,
						easing: tween.easeOut,
						onFinish: function onFinish() {
							if (block && block.destroy) {
								block.destroy();
							}
						}
					});
					gameGrid[lineY][x] = null;
				}
			}
			// Move lines down
			for (var y = lineY; y > 0; y--) {
				for (var x = 0; x < GRID_WIDTH; x++) {
					gameGrid[y][x] = gameGrid[y - 1][x];
					if (gameGrid[y][x]) {
						gameGrid[y][x].setGridPosition(x, y);
					}
				}
			}
			// Clear top line
			for (var x = 0; x < GRID_WIDTH; x++) {
				gameGrid[0][x] = null;
			}
		}
		// Update score
		linesCleared += completedLines.length;
		var points = 0;
		switch (completedLines.length) {
			case 1:
				points = 100;
				break;
			case 2:
				points = 300;
				break;
			case 3:
				points = 500;
				break;
			case 4:
				points = 800;
				break;
		}
		LK.setScore(LK.getScore() + points * gameLevel);
		// Level up every 10 lines
		var newLevel = Math.floor(linesCleared / 10) + 1;
		if (newLevel > gameLevel) {
			gameLevel = newLevel;
		}
		LK.getSound('line_clear').play();
	}
}
// Create score display
var scoreText = new Text2('Score: 0', {
	size: 40,
	fill: 0xFFFFFF
});
scoreText.anchor.set(1, 0);
scoreText.x = -50;
LK.gui.topRight.addChild(scoreText);
var levelText = new Text2('Level: 1', {
	size: 40,
	fill: 0xFFFFFF
});
levelText.anchor.set(1, 0);
levelText.x = -50;
levelText.y = 60;
LK.gui.topRight.addChild(levelText);
var linesText = new Text2('Lines: 0', {
	size: 40,
	fill: 0xFFFFFF
});
linesText.anchor.set(1, 0);
linesText.x = -50;
linesText.y = 120;
LK.gui.topRight.addChild(linesText);
// Add background color asset
var backgroundColorAsset = LK.getAsset('background_color', {
	x: 0,
	y: 0
});
game.addChild(backgroundColorAsset);
// Draw grid borders - vertical lines only for game area height
for (var x = 0; x <= GRID_WIDTH; x++) {
	if (x === 0 || x === GRID_WIDTH) {
		var border = LK.getAsset('grid_border', {
			x: GRID_OFFSET_X + x * BLOCK_SIZE - 4,
			y: GRID_OFFSET_Y,
			scaleX: 1,
			scaleY: GRID_HEIGHT * BLOCK_SIZE / 8
		});
		game.addChild(border);
	}
}
for (var y = GRID_HEIGHT; y <= GRID_HEIGHT; y++) {
	for (var x = 0; x < GRID_WIDTH; x++) {
		var border = LK.getAsset('grid_border', {
			x: GRID_OFFSET_X + x * BLOCK_SIZE,
			y: GRID_OFFSET_Y + y * BLOCK_SIZE,
			scaleX: BLOCK_SIZE / 8,
			scaleY: 1
		});
		game.addChild(border);
	}
}
// Spawn first piece
spawnNewPiece();
// Start background music
LK.playMusic('tetris_theme');
game.down = function (x, y, obj) {
	if (!currentPiece) return;
	var now = Date.now();
	if (now - lastMoveTime < moveDelay) return;
	lastMoveTime = now;
	// Divide screen into zones for controls
	var leftZone = 2048 * 0.25;
	var rightZone = 2048 * 0.75;
	var rotateZone = 2732 * 0.7;
	if (x < leftZone) {
		// Left movement
		currentPiece.move(-1, 0);
	} else if (x > rightZone) {
		// Right movement  
		currentPiece.move(1, 0);
	} else if (y > rotateZone) {
		// Drop piece faster
		currentPiece.move(0, 1);
	} else {
		// Rotate piece
		currentPiece.rotate();
	}
};
game.update = function () {
	if (currentPiece) {
		// Update fall speed based on level
		currentPiece.fallSpeed = Math.max(20, 80 - (gameLevel - 1) * 10);
	}
	// Update UI
	scoreText.setText('Score: ' + LK.getScore());
	levelText.setText('Level: ' + gameLevel);
	linesText.setText('Lines: ' + linesCleared);
};

===================================================================
--- original.js
+++ change.js
@@ -147,14 +147,47 @@
 	self.placePiece = function () {
 		// Prevent multiple calls
 		if (self.isPlaced) return;
 		self.isPlaced = true;
-		// Add blocks to grid
+		// Add blocks to grid and create sparkle effects
 		for (var i = 0; i < self.blocks.length; i++) {
 			var block = self.blocks[i];
 			if (block.gridY >= 0) {
 				if (!gameGrid[block.gridY]) gameGrid[block.gridY] = [];
 				gameGrid[block.gridY][block.gridX] = block;
+				// Create sparkle effect around the block
+				var sparkleCount = 8;
+				for (var j = 0; j < sparkleCount; j++) {
+					var sparkle = LK.getAsset('grid_border', {
+						x: block.x + BLOCK_SIZE / 2,
+						y: block.y + BLOCK_SIZE / 2,
+						scaleX: 0.5,
+						scaleY: 0.5,
+						alpha: 1
+					});
+					game.addChild(sparkle);
+					// Random sparkle position around block
+					var angle = j / sparkleCount * Math.PI * 2;
+					var distance = BLOCK_SIZE * 0.7;
+					var targetX = sparkle.x + Math.cos(angle) * distance;
+					var targetY = sparkle.y + Math.sin(angle) * distance;
+					// Animate sparkle outward and fade
+					tween(sparkle, {
+						x: targetX,
+						y: targetY,
+						alpha: 0,
+						scaleX: 0.1,
+						scaleY: 0.1
+					}, {
+						duration: 300,
+						easing: tween.easeOut,
+						onFinish: function onFinish() {
+							if (sparkle && sparkle.destroy) {
+								sparkle.destroy();
+							}
+						}
+					});
+				}
 			}
 		}
 		// Remove blocks from this tetromino since they're now part of the grid
 		self.blocks = [];