let sliderParams = [

  [10, 300, 100],

  [4, 100, 17],

  [0, 30, 10],

  [0, 10, 2],

  [0, 300, 30],

  [0, 200, 0],

  [1, 10, 3],

  [10, 100, 20]

];

​

function setup() {

  createCanvas(400, 400);

  angleMode(DEGREES);

  background(0);

  frameRate(10);

​

  for(let i = 0; i < sliderParams.length; i++) {

    let minv = sliderParams[i][0];

    let maxv = sliderParams[i][1];

    let startv = sliderParams[i][2];

    sliders[i] = createSlider(minv, maxv, startv);

    sliders[i].position(10, height + 20 + 30*i);

    sliders[i].style('width', width/2 + 'px');

  }

}

​

function draw() {

  background(0);

  let circleSize = sliders[0].value();

  let rayCount = sliders[1].value();

  let tipSize = sliders[2].value();

  let tipN = sliders[3].value();

  let lineLength = sliders[4].value();

  let lineBeginR = sliders[5].value();

  let strokeW = sliders[6].value();

  let starN = sliders[7].value();

  /* Random is optional! */

  circleSize = random(10, 200);

  rayCount = int(random(5, 50));

  tipSize = random(0, 20);

  tipN = int(random(1, 3));

  lineLength = random(0, 100);

  lineBeginR = random(0, circleSize);

  strokeW = random(1, 6);

  starN = random(7, 50);

  noFill();

  stroke(255);

  strokeWeight(strokeW);

  circle(width/2, height/2, circleSize);

  for(let i = 0; i < rayCount; i++) {

    let r1 = lineBeginR;

    let r2 = circleSize/2 + lineLength;

    let alpha = i * (360 / rayCount);

    let x1 = width/2 + r1 * cos(alpha);

    let y1 = height/2 + r1 * sin(alpha);

    let x2 = width/2 + r2 * cos(alpha);

    let y2 = height/2 + r2 * sin(alpha);

    line(x1, y1, x2, y2);

    if (i % tipN === 0)

      circle(x2, y2, tipSize);

  }

  star(width/2, height/2, 

       circleSize/2-40, circleSize/2-20, starN);

}

​

function star(x, y, radius1, radius2, npoints) {

  let angle = 360 / npoints;

  let halfAngle = angle / 2.0;

  beginShape();

  for (let a = 0; a < 360; a += angle) {

    let sx = x + cos(a) * radius2;

    let sy = y + sin(a) * radius2;

    vertex(sx, sy);

    sx = x + cos(a + halfAngle) * radius1;

    sy = y + sin(a + halfAngle) * radius1;

    vertex(sx, sy);

  }

  endShape(CLOSE);

}

​