SOURCE

let a=0;
function setup(){
    createCanvas(500,500);
    background(255);
}
function draw(){
    background(255,10);
    a+=0.3;
    noFill();
    push();
    stroke(0);
    translate(250,250)
    rotate(a);
    translate(-150,-150);
    rect(0,0,250,250);
    pop();
    push();
    stroke(0,40);
    translate(250,250);
    scale(random(10));
    ellipse(0,0,40,40)
    pop();
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/p5.js/1.1.9/p5.min.js"></script>