let c = 10;

  let magicAngle = 137.5;

  // let magicAngle = 134.5;

  // let magicAngle = 133.5;

  colorMode(HSB, 100);

  createCanvas(600, 600);

  background(220);

  translate(width/2,height/2);

  noStroke();

  for(let n = 1 ; n < 255 ; n++){ 

  let hu = sin(n * 0.5);

  let a = n * magicAngle;

  let r = c * sqrt(n);

  let x = r * cos(a);

  let y = r * sin(a);

    hu = map(hu, -1, 1, 0, 360);

    fill(hu, 255, 255);

  circle(x, y, 15);

  }

}