let rez = 10;

​

function setup() {

  createCanvas(400, 400);

  frameRate(5);

  snake = new Snake();

}

​

function keyPressed() {

  if (keyCode === LEFT_ARROW) {

    snake.setDir(-1, 0);

  } else if (keyCode === RIGHT_ARROW) {

    snake.setDir(1, 0);

  } else if (keyCode === DOWN_ARROW) {

    snake.setDir(0, 1)

  } else if (keyCode === UP_ARROW) {

    snake.setDir(0, -1)

  }

}

​

function draw() {

  scale(rez)

  background(220);

  snake.update();

  snake.show();

}