let noiseSpeed = 0.01;

let noiseHeight = 20;

​

function setup() {

  createCanvas(windowWidth, windowHeight);

  noiseY = height * 3 / 4;

}

​

function draw() {

  background(0, 15);

​

  noStroke();

  fill(255);

  for (let i = 0; i < 10; i++) {

    let xrandom = random(width);

    let yrandom = random(height / 2);

    ellipse(xrandom, yrandom, 3, 3);

  }

​

  for (let j = 0; j < 3; j++) {

    let offsetY = j * 100;

    noFill();

    stroke(0, 0, 255, 10);

    strokeWeight(height / 2);

    beginShape();

    curveVertex(0, height / 2);

    for (let i = 0; i < width; i += 50) {

      let y = noise(frameCount * noiseSpeed + i + j) * noiseHeight + noiseY + offsetY;

      curveVertex(i, y);

    }

    curveVertex(width, height / 2);

    endShape(LINES);

  }

​

}