SOURCE

let a=0;
let b=0;
let c=0;
function setup(){
    createCanvas(500,500);
    background(255);
}
function draw(){
    background(255,10);
    a+=0.02;
    noFill();
    push();
    stroke(0);
    translate(250,250);
    rotate(a);
    rect(0,0,50,50);
    pop();
    push();
        stroke(0);
    translate(250,250);
    b+=0.05
    rotate(b);
    rect(0,0,110,110);
    pop();
    push();
     stroke(0);
    translate(250,250);
    c+=0.1
    rotate(c);
    rect(0,0,220,220);
    pop();
}

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