let c = createCanvas(windowWidth, windowHeight);

  c.parent(document.body)

  background(0);

}

​

function draw() {

  background(0, 10);

  translate(random(width), random(height));

  stroke("yellow");

  line(-2, 0, 2, 0);

  line(0, -2, 0, 2);

}

​

function windowResized() {

  resizeCanvas(windowWidth, windowHeight);

  background(0);

}