SOURCE

let a = 0.0;

let x=0;

let y=0;

let r=60;

function setup() {

createCanvas(500, 500);

colorMode(RGB,20,100,300);

//background(20);

}

function draw() {

a+=20;

noStroke();

fill(random(20),900,800);

r=random(0,130); 

y=r*sin(radians(a))+100;

x=r*cos(radians(a))+200;

ellipse(x,y,100,100);
}

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