​

function setup() {

  createCanvas(400, 400);

  strokeWeight(5);

  prev = height//2;

}

​

​

x = 2;

​

​

​

function draw() {

  stroke(lerpColor(color('red'), color('blue'), x/width))

  if (x > width ) {

    x = 0;

    prev = 0;

    background(random())

  }

  y = noise(x)*200 + 200;

  point(x, y)

  line(x, prev, x-1, y);

  prev = y;

  x++;

}