script - OpenProcessing

mySketch
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var nx = 40;
var ny = 20;
var sx, sy;
​
function setup() {
  createCanvas(400, 560);
  background(220);
  noLoop();
}
​
function draw() {
  sx = width/nx;
  sy = height/ny;
    for (var x = 2.5*sx; x < width - 1.5*sx; x += sx) {
    for (var y = 1.5*sy; y < height - 0.5*sy; y += sy) {
      stroke(40);
      strokeWeight(2);
      noFill();
      if (random(100)>30){
        if (random(100)>50) {
          arc(x + random(-sx/4,sx/4), y + random(-sy/4,sy/4), 4+random(4), 4+random(4), random(0, HALF_PI), random(HALF_PI, PI));
        }
        if (random(100)>50) {
          arc(x + random(-sx/4,sx/4), y + random(-sy/4,sy/4), 4+random(4), 4+random(4), random(PI, PI+HALF_PI), random(PI+HALF_PI, TWO_PI));
        }
        if (random(100)>30) {
          line(random(x-sx/4, x+sx/4),random(y-sy/4, y+sy/4),random(x-sx/4, x+sx/4),random(y-sy/4, y+sy/4));
        }
        if (random(100)>40) {
          line(random(x-sx/4, x+sx/4),random(y-sy/4, y+sy/4),random(x-sx/4, x+sx/4),random(y-sy/4, y+sy/4));
        }
        if (random(100)>50) {
          line(random(x-sx/4, x+sx/4),random(y-sy/4, y+sy/4),random(x-sx/4, x+sx/4),random(y-sy/4, y+sy/4));
        }
        if (random(100)>60) {
          line(random(x-sx/4, x+sx/4),random(y-sy/4, y+sy/4),random(x-sx/4, x+sx/4),random(y-sy/4, y+sy/4));
        }
      }
      
    }
  }
}