p5js random wee experiment

cirlcey_spirally_thing.js

var fcount = 0;

function setup() {
  createCanvas(400, 400);
}

function draw() {
  background(0);
	noStroke();
	smooth();
	for (var j = 0; j < 5; ++j) {
		var numCircle = (j+1)*2;
		var d = 15 + j*25;
		for (var i = 0; i < numCircle; ++i) {
			var a = (i/numCircle)*TWO_PI + fcount/((j+1)*30.0);
			var s = 10 + j*2;
			ellipse(width/2 + d*cos(a), height/2 + d*sin(a), s, s);
		}
	}
	fcount += 4;
	if (fcount == 1800) {
		fcount = 10;	
	}
}