SOURCE

let a=0;
let tx=0;
let ty=0;
function setup(){
    createCanvas(600,600);
    background(0);
    nx=random(600);
    ny=random(600);
}
function draw(){
    nx=noise(tx);
    ny=noise(ty);
    nx=map(nx,0,1,0,width);
    ny=map(ny,0,1,0,width);
    tx+=0.011;
    ty+=0.1;
    ellipse(constrain(nx,0,width),constrain(ny,0,height));
    a+=0.1;
    translate(mouseX,mouseY);
    rotate(a);
    rotate(a);
    scale(map(mouseX,0,600,0,1));
    rect(0,0,100,100);
}

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