float piarc = 0.0;
float bgfill = 0.0;

void setup (){
  size (600,600);
  background(240);
  smooth();
  //  noLoop();
}

void draw (){
  float nx = random(1,4);
  piarc = piarc + .01;
  float n = noise(piarc) * nx;
  
  bgfill = bgfill + .01;
  float bgfilln = noise(bgfill) * 200;
  println(bgfilln);
  fill(bgfilln,20);
  rect(0,0,width,height);
  for (int x=0; x<height; x=x+55) {
    for (int y=0; y<height; y=y+55) {
      float rnd=n;
      //      stroke(random(255),random(10),random(255),random(80,100));
      noStroke();
      fill(random(255),random(10),random(10),10);
      ellipseMode(CORNER);
//            rect(x, y, 55, 55);
      fill(random(20,255),random(0),random(255),50);
      //     fill(255,0,0,50);
      arc(x, y, 50, 50, 0, PI/rnd);
    }
  }
}


void mousePressed() {
  background(240);
  redraw();
}

void keyPressed(){
 // save frame
  if(keyPressed) {
    if (key == 's' || key == 'S') {
      saveFrame("image-####.png");
    }
  }
}