let s = r * 4;

​

function setup() {

  createCanvas(windowWidth, windowHeight);

  angleMode(DEGREES);

  //colorMode(HSB, 100);

  noFill();

  background("#eaf4f7");

  stroke("#c1e4e9");

  strokeWeight(1);

}

​

function draw() {

​

  for (let j = r; j < width + s; j = j + s) {

    for (let i = 0; i < height; i++) {

      line(-sin(i * 3) * 6 - r + j, i, sin(i * 3) * 6 + r + j, i);

    }

  }

}

​