const canvas = document.getElementById('game');
const ctx = canvas.getContext('2d');
const GRID = 20, SPEED = 150;
let snake = [{x: 10, y: 10}];
let food = spawnFood();
let dir = {x: 1, y: 0};
let score = 0;
function gameLoop() {
moveSnake();
checkCollision();
draw();
setTimeout(gameLoop, SPEED);
}