function setup() {

  createCanvas(400, 400);

}

​

function draw() {

  n1 = n1 + 0.01

  noiseSeed(1);

  x1 = noise(n1) * width;

  noiseSeed(2);

  x2 = noise(n1) * width;

  noiseSeed(3);

  y1 = noise(n1) * height;

  noiseSeed(4);

  y2 = noise(n1) * height;

  background(220);

  strokeWeight(4);

  stroke(0);

  line(x1, y1, x2, y2);

}