createCanvas(2598/4, 2126/4);

  //noLoop();

  frameRate(4);

  colorMode(HSB);

  pixelDensity(4);

}

​

let x, y, opacity;

let step, freq;

function draw() {

  background(255);

  blendMode(DARKEST)

  noStroke();

  step = random(2, 30);

  wi = random(width/2, width);

  freq = round(random(3, 6));

  for (let i = 0; i < freq; i++) {

    gradient(random(0, width/2), random(height/2), wi, step);

  }

  if (frameCount < 300) {

    save("gradient_BG_top-" + frameCount + ".jpg");

    console.log("saved" + frameCount);

  } else {

    console.log("done" + frameCount);

  }

  blendMode(BLEND)

}

​

function gradient(x,y, s, jump) {

  let o = 0;

  //let s = random(200);

  for (let r = s; r > 0; r-=jump) {

    fill(54, o, 100);

    ellipse(x, y, r, r);

    o++;

  }

}

​