createCanvas(800, 800);

  background(20);

  let nc = 10;

  let cs = width / nc;

  noFill();

  stroke(220);

  let cs2 = cs / 2;

  for (let y = cs2; y < height; y += cs) {

    for (let x = cs2; x < width; x += cs) {

      circle(x,y,cs-8);

    }

  }

  imageMode(CENTER);

  for (let _ = 0; _ < 10; _++) {

    let w = 40;

    let g = createGraphics(w, height*2);

    g.background(0);

    g.stroke(220);

    g.noFill();

    let _nc = int(random(2,8));

    let _cs = w/_nc;

    let _cs2 = _cs/2;

     for (let y = _cs2; y < g.height; y += _cs) {

       let col = lerpColor(color(220), color(0,220,0), map(y, _cs2, g.height, 0.0, 1.0))

       g.stroke(col)

       for (let x = _cs2; x < g.width; x += _cs) {

         g.circle(x,y,_cs-2);

       }

     }

    push();

    translate(width/2,height/2);

    rotate(random(TWO_PI));

    translate(random(-width/4,width/4), random(-height/4,height/4));

    image(g, 0, 0);

    pop();

  }

  fill(0);

  noStroke();

  rect(0,0,width,20);

  rect(0,0,20,height);

  rect(width-20,0,20,height);

  rect(0,height-20,width,20);

}

​

function draw() {

  // background(220);

}