Windmill - OpenProcessing

mySketch
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var gB, fullRes, windowRes;
var requiredFrames = 180;
​
function setup() {
  windowRes = min(windowWidth, windowHeight);
  createCanvas(windowRes, windowRes);
  imageMode(CENTER);
  gB = createGraphics(fullRes = 64, fullRes);
  gB.colorMode(HSB, 360);
  gB.rectMode(CENTER);
  gB.fill(360);
  gB.noSmooth();
  noSmooth();
}
​
function randPow(multiplier, min, max, power) {
  for (var i = 0; i < power; i += 1) {
    multiplier *= random(min, max);
  }
  return multiplier;
}
​
function draw() {
  gB.clear();
  gB.resetMatrix();
  gB.stroke(0);
  gB.strokeWeight(1);
  gB.blendMode(ADD);
​
  let currentFrame = (frameCount / requiredFrames) % 1;
​
  gB.translate(fullRes * 0.5, fullRes * 0.5);
  let lines = 48;
  let phase = 1;
  for (let i = 0; i < 1; i += 1 / lines) {
    phase += 1;
    gB.push();
    if (phase % 2 === 0) {
      gB.rotate(map((currentFrame + i) % 1, 0, 1, 0, TAU));
    } else {
      gB.rotate(map((currentFrame + i) % 1, 1, 0, 0, TAU));
    }
    for (let j = 0; j < 512; j += 1) {
      let distance = random() * random(fullRes * 0.5, fullRes);
      let theta;
    if (phase % 2 === 0) {
      theta = randPow(TAU, 0, 1, 4);
    } else {
      theta = -randPow(TAU, 0, 1, 4);
    }
      let brightnessValue = map(distance, 0, fullRes, 360, 0);
      if (phase % 3 === 0) {
      gB.stroke(0, 360, brightnessValue);
      } else if (phase % 3 === 1) {
      gB.stroke(120, 360, 0.25 * brightnessValue);
      } else {
      gB.stroke(240, 360, brightnessValue);
      }
      gB.point(distance * cos(theta), distance * sin(theta));
    }
    gB.pop();
  }
​
  background(0);
  displayBuffer(gB);
}
​
function keyPressed() {
  if (key === "r") {
    windowRes = 512;
    resizeCanvas(512, 512);
    saveGif('export', requiredFrames, {
      delay: 0,
      units: "frames"
    });
  }
  if (key === "s") {
    saveCanvas();
  }
}
​
function displayBuffer(buffer) {
  image(buffer, windowRes / 2, windowRes / 2, windowRes, windowRes);
}
​
function windowResized() {
  windowRes = min(windowWidth, windowHeight);
  resizeCanvas(windowRes, windowRes);
}