var y = 200;

var gameOver = false;

var direction = 40;

​

function setup() {

  createCanvas(400, 400);

  background(0,0,255);

  fill(0);

  rect(3,3,393,393);

  textSize(40);

  textAlign(CENTER);

}

​

function draw() {

  if (gameOver === true)

  return;

if(notBlack() === true){

  fill(255);

  text("Game Over!",200,120);

  gameOver = true;

}

stroke(255);

  point(x,y);

  if (direction === 37)

  x = x - 1;

  if (direction === 38)

  y = y - 1;

  if (direction === 39)

  x = x + 1;

  if (direction === 40)

  y = y + 1;

}

​

function notBlack() {

  var a = get(x, y);

  if (a[0] !== 0) return true;

  else if (a[1] !== 0) return true;

  else if (a[2] !== 0) return true;

  return false;

}

function keyPressed(){

if(keyCode >= 37 && keyCode <= 40)

  direction = keyCode;

}