let radius = 0;

let angle = 0;

​

let numArms;

let deltaRadius;

let deltaAngle;

let curve;

​

let hue;

let hueChanger;

​

function setup() {

  createCanvas(window.innerWidth, window.innerHeight);

  angleMode(DEGREES);

  // Call reset to init all variables

  reset();

}

​

function draw() {

  translate(width / 2, height / 2);

  // update angle and radius

  angle += deltaAngle;

  radius += deltaRadius;

  // get position from polar coordinates

  x = radius*cos(angle)

  y = radius*sin(angle)

  // update colours

  hue += hueChanger;

  colorMode(HSB);

  // draw the point

  strokeWeight(10);

  stroke(color(hue,60,100))

  point(x, y);

  // bounce colours

  if(hue>360){

    hue = 0;

  }

  // Get the spiral to come inwards forming a flower

  if (radius > height / 2 - 25) {

    deltaRadius = -deltaRadius;

  }

  if (radius < 0) {

    reset();

  }

}

​

function reset() {

  background(0);

  deltaRadius = random(0.5,1);

  numArms = floor(random(3,8))

  curve = random(0.3,1);

  // Number of arms/360 + curve to make the arms curve a little

  deltaAngle = 360 / numArms + curve;

  hue = random(0, 360);

  hueChanger = random(1,5);

}

​