const canvas = document.getElementById('canvas'); const ctx = canvas.getContext('2d'); const playerSize = 10; const ballSize = 5; let ballX = canvas.width / 2; let ballY = canvas.height / 2; let ballSpeedX = 2; let ballSpeedY = 2; let player1Y = 0; let player2X = canvas.width - playerSize; let player3Y = canvas.height - playerSize; let player4X = 0; let playerSpeed = 2; let keys = {}; document.addEventListener('keydown', (e) => keys[e.key] = true); document.addEventListener('keyup', (e) => keys[e.key] = false); function movePlayers() { if (keys['ArrowUp'] && player1Y > 0) player1Y -= playerSpeed; if (keys['ArrowDown'] && player1Y < canvas.height - playerSize) player1Y += playerSpeed; if (ballY < player2X && player2X > 0) player2X -= playerSpeed; if (ballY > player2X && player2X < canvas.height - playerSize) player2X += playerSpeed; if (ballX < player3Y && player3Y > 0) player3Y -= playerSpeed; if (ballX > player3Y && player3Y < canvas.width - playerSize) player3Y += playerSpeed; if (ballY < player4X && player4X > 0) player4X -= playerSpeed; if (ballY > player4X && player4X < canvas.height - playerSize) player4X += playerSpeed; } function moveBall() { ballX += ballSpeedX; ballY += ballSpeedY; if (ballY <= player1Y + playerSize && ballX <= playerSize) ballSpeedY = -ballSpeedY; if (ballX >= player2X && ballY <= player2X + playerSize) ballSpeedX = -ballSpeedX; if (ballY >= player3Y && ballX >= canvas.width - playerSize) ballSpeedY = -ballSpeedY; if (ballX <= player4X + playerSize && ballY >= canvas.height - playerSize) ballSpeedX = -ballSpeedX; if (ballX <= 0 || ballX >= canvas.width) ballSpeedX = -ballSpeedX; if (ballY <= 0 || ballY >= canvas.height) ballSpeedY = -ballSpeedY; } function draw() { ctx.clearRect(0, 0, canvas.width, canvas.height); ctx.fillRect(0, player1Y, playerSize, playerSize); ctx.fillRect(player2X, 0, playerSize, playerSize); ctx.fillRect(canvas.width - playerSize, player3Y, playerSize, playerSize); ctx.fillRect(player4X, canvas.height - playerSize, playerSize, playerSize); ctx.fillRect(ballX, ballY, ballSize, ballSize); } function gameLoop() { movePlayers(); moveBall(); draw(); requestAnimationFrame(gameLoop); } gameLoop();

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Ping pong but there's 4 players 1 player 4 ais so 4 corner

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