ASSISTANT
Creating a Tetris game that guarantees a win is quite complex, as traditional Tetris is inherently challenging, hinging on player skill and randomness of the pieces. However, I can provide a simple Tetris game implementation in HTML, CSS, and JavaScript.
In this code, I'll implement a basic Tetris game that continuously stacks pieces without losing—a "never lose" condition can only be approximated by not allowing pieces to reach the top of the board by simply placing them without player interaction.
Here's a simple implementation:
```html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Never Lose Tetris</title>
<style>
body {
display: flex;
justify-content: center;
align-items: center;
height: 100vh;
margin: 0;
background-color: #222;
}
#tetris {
display: grid;
grid-template-columns: repeat(10, 30px);
grid-template-rows: repeat(20, 30px);
border: 2px solid #fff;
}
.cell {
width: 30px;
height: 30px;
border: 1px solid #222;
}
.filled {
background-color: cyan;
}
</style>
</head>
<body>
<div id="tetris"> </div>
<script>
const Tetris = {
canvas: document.getElementById('tetris'),
context: null,
rows: 20,
cols: 10,
board: [],
currentPiece: null,
timer: null,
shapes: [
[['100','110','000'], [[0,1],[1,0],[1,1]]], // Square
[['010','011','000'], [[0,1],[1,1],[1,0]]], // L shape
[['001','011','000'], [[0,1],[0,0],[1,1]]], // Reverse L shape
[['010','100','001'], [[0,0],[1,1],[0,2]]], // T shape
[['001','001','011'], [[0,0],[0,1],[1,1]]] // S shape
],
init() {
this.board = Array.from({ length: this.rows }, () => Array(this.cols).fill(0));
this.currentPiece = this.getRandomPiece();
this.drawBoard();
this.startGame();
},
drawBoard() {
this.canvas.innerHTML = '';
for (let r = 0; r < this.rows; r++) {
for (let c = 0; c < this.cols; c++) {
const cell = document.createElement('div');
cell.classList.add('cell');
if (this.board[r][c] === 1) {
cell.classList.add('filled');
}
this.canvas.appendChild(cell);
}
}
},
getRandomPiece() {
const pieceIndex = Math.floor(Math.random() * this.shapes.length);
return this.shapes[pieceIndex];
},
placePiece() {
const shape = this.currentPiece[0];
for (let r = 0; r < shape.length; r++) {
for (let c = 0; c < shape[r].length; c++) {
if (shape[r][c] === '1') {
this.board[r][c] = 1;
}
}
}
// Remove filled rows
this.removeFilledRows();
this.currentPiece = this.getRandomPiece();
this.checkGameOver();
this.drawBoard();
},
removeFilledRows() {
for (let r = this.rows - 1; r >= 0; r--) {
if (this.board[r].every(cell => cell === 1)) {
this.board.splice(r, 1);
this.board.unshift(Array(this.cols).fill(0));
}
}
},
checkGameOver() {
if (this.board[0].some(cell => cell === 1)) {
clearInterval(this.timer);
alert("Game Over!");
}
},
startGame() {
this.timer = setInterval(() => {
this.placePiece();
}, 1000);
}
};
Tetris.init();
</script>
</body>
</html>
```
### Explanation:
- **HTML Structure**: The structure contains a `div` for the Tetris board.
- **CSS Styles**: Basic styling is added for the game board and pieces.
- **JavaScript Logic**:
- The game board is initialized with a grid of cells.
- Random pieces are generated continuously and placed at the top of the board.
- It checks for complete rows and fills them to keep the flow.
- If pieces reach the top, the game stops displaying a 'Game Over' alert.
### Important Notes:
- The pieces stack automatically without any rotation or movement needed from the user, simulating a 'never lose' condition.
- This is a simplified version of the Tetris game and does not include all features like controls, score keeping, or advanced piece shapes.
- You can enhance it further if needed!