let a =0;
let x=0;
let y=0;
let r=60;
function setup() {
createCanvas(500,500);
colorMode(HSB,490,100,50);
//background(100);
}
function draw(){
a+=20;
noStroke();
fill(random(170),250,120);
r=random(50,100);
y=r*sin(radians(a))+360;
x=r*cos(radians(a))+360;
ellipse(x,y,50,50);
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/p5.js/1.1.9/p5.min.js"></script>