createCanvas(windowWidth, windowHeight);

  frameRate(30)

  colorMode(HSB, 1, 1, 1, 1);

  strokeWeight(4)

  anim_frames = 60z

  angle = 0

  angle_delta = TAU / anim_frames

}

​

function draw() {

  translate(width / 2, height / 2);

  rotate(angle);

  background(0);

  drawSpiral(200, 5.5)

  drawSpiral(200, 5.25)

  drawSpiral(200, 5)

  drawSpiral(200, 4.75)

  drawSpiral(200, 4.5)

  angle += angle_delta

}

​

function drawSpiral(num_points, num_rotations) {

  prev_x = 0;

  prev_y = 0;

  for (let i = 0; i < num_points; i++) {

    a = map(i, 0, num_points, 0, TAU * num_rotations);

    r = map(i, 0, num_points, 1, min(width, height) * 0.75);

    x = r * cos(a);

    y = r * sin(a);

    stroke(i / num_points, 1, 1)

    line(prev_x, prev_y, x, y);

    prev_x = x;

    prev_y = y;

  } 

}

​