var b;

var c;

var d;

​

//background color

function setup() {

  createCanvas(600, 600);

  background(0, 2, 66);

}

​

let xPos = 300;

let yPos = 300;

let height = 0;

let width = 0;

​

//loop

for (yPos = 300; yPos < height; yPos = yPos) {

  for (xPos = 300; xPos < width; xPos = xPos) {}

}

​

// thick white stroke around the "disc"

function draw() {

  strokeWeight(7);

  stroke(255);

​

  //random flickering colors of the "disc"

  a = random(255);

  b = random(255);

  c = random(255);

  d = random(255);

  fill(a, b, c, d);

  ellipse(xPos, yPos, 500, 500);

​

  //white strokes inside the "disc"

  strokeWeight(6);

  stroke(255);

  ellipse(xPos, yPos, 400, 400);

​

  strokeWeight(5);

  stroke(255);

  ellipse(xPos, yPos, 320, 320);

​

  strokeWeight(5);

  stroke(255);

  ellipse(xPos, yPos, 260, 260);

​

  strokeWeight(5);

  stroke(255);

  ellipse(xPos, yPos, 210, 210);

​

  strokeWeight(5);

  stroke(255);

  ellipse(xPos, yPos, 170, 170);

​

  strokeWeight(5);

  stroke(255);

  ellipse(xPos, yPos, 140, 140);

​

  strokeWeight(5);

  stroke(255);

  ellipse(xPos, yPos, 110, 110);

​

  strokeWeight(5);

  stroke(255);

  ellipse(xPos, yPos, 90, 90);

​

  strokeWeight(5);

  stroke(255);

  ellipse(xPos, yPos, 70, 70);

​

  strokeWeight(5);

  stroke(255);

  ellipse(xPos, yPos, 55, 55);

​

  strokeWeight(5);

  stroke(255);

  ellipse(xPos, yPos, 40, 40);

​

  strokeWeight(5);

  stroke(255);

  ellipse(xPos, yPos, 25, 25);

}

​