let noiseScale= 0.01;

​

function setup() {

  createCanvas(400, 400);

  background(220);

​

}

​

function draw() {

​

  noFill();

  stroke(0, 50);

  translate(0, height/2);

​

  beginShape();

  for (let x=0; x < width; x++) {

    let noiseVal = noise(x * noiseScale, height/2 *noiseScale);

    vertex(x * noiseScale, noiseVal*50);

  }

  noiseScale += 0.01

  endShape();

}