let step = 0;

​

function setup() {

  createCanvas(400, 400);

}

​

function butterfly(step){

  translate(200, 200);

  let coords = [];

  const rounds = step % 360;

  const ee = step % 1.618;

  colorMode(HSB);

  var i = 0;

  while (i < rounds) {

        var x = cos(i*PI)*ee*ee*rounds % 400;

        var y = sin(i)*ee*rounds % 400;

        stroke(noise(x+y+step)*250);

        //print(`${x} ${y}`);

        point(x, y);

        i++;

  }

}

​

function draw() {

  butterfly(step);

  step++;

}