const size = min(windowWidth, windowHeight);

  createCanvas(size, size);

  colorMode(HSL, 1);

}

​

let n;

function draw() {

  scale(width, height);

  background(0);

  stroke(1);

  strokeWeight(0.002);

​

  n = 3 + floor(4 * mouseX / width);

  const depth = floor(5 * mouseY / height);

​

  drawFractal(0.5, 0.5, 0.4, depth);

}

​

function polar(angle, radius) {

  return {

    x: cos(angle * TWO_PI) * radius,

    y: sin(angle * TWO_PI) * radius,

  }

}

​

function drawFractal(x, y, size, depth) {

  for (let i = 0; i < n; i++) {

    const f = i / n;

    const angle = f + 0.25;

​

    if (depth > 0) {

      const scale = 0.5;

      const s = size * scale;

      const p = polar(angle, s);

      drawFractal(x + p.x, y + p.y, s, depth - 1);

    } else {

      const p1 = polar(angle, size);

      const p2 = polar(angle + 1 / n, size);

      line(x + p1.x, y + p1.y, x + p2.x, y + p2.y);

    }

  }

}