One Hour of Code

hoc-daniele.js

var initialOffset    = 10;
var offset           = 25;
var globalCircleSize = 15;

var col = {
  r: 180, 
  g: 63, 
  b: 203
  }
function setup() {
  createCanvas(800, 800);
  background(0);  
  //randomSeed(0);
  noStroke();
}

function draw() {
  circleSize = globalCircleSize;
  col.r = random(100, 180);
  col.g = random(0, 63);
  col.b = random(0, 203);
  for (var y = initialOffset; y < height; y = y + offset ) {
    for (var x = initialOffset; x < width; x = x + offset) {
      fill(col.r, col.g, col.b)
        ellipse(x, y, circleSize, circleSize);
      circleSize = Math.abs(randomGaussian(5, 10)) | 0;
    }
  }
}