let diamLarge;

let diamSmall;

function setup() {

  createCanvas(windowWidth, windowHeight);

  rectMode(CENTER);

  diamLarge = height-100;

  diamSmall = height/3;

}

​

function draw() {

  background(20,3);

  strokeWeight(0.5);

  stroke(42);

  translate(width/2,height/2);

  rotate(rot);

  fill(255,10)

  circle(0, 0, diamLarge);

  fill(255,5)

  circle(0-50, 0, diamSmall);

  circle(0+50, 0, diamSmall);

  circle(0, 0-50, diamSmall);

  circle(0, 0+50, diamSmall);

  rot+=0.01;

  diamSmall += sin(rot)*1.2;

  diamLarge += sin(rot)*3;

  stroke(55,100);

  fill(100,1);

  rect(0,0, 82-(sin(rot)*50), 82-(sin(rot)*50));

}