//let xoff2 = 10000;

let inc = 0.01

let start = 0;

​

function setup() {

  createCanvas(400, 400);

}

​

function draw() {

  background(51);

  stroke(255);

  noFill();

  beginShape();

  let xoff = start;

  for (let x = 0; x < width; x++) {

    stroke(255);

    //let y = random(height);

    let y = height/2 + cos(xoff) * height/2;

    vertex(x, y);

    xoff += inc;

  }

  endShape();

  start += inc;

  /*

  let x = map(noise(xoff1), 0, 1, 0, width);

  let y = map(noise(xoff2), 0, 1, 0, height);

  xoff1 += 0.02;

  xoff2 += 0.02;

  circle(x, y, 24);

  */

}