Bloom - OpenProcessing

sketch
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// By Roni Kaufman
// https://ronikaufman.github.io/
// https://twitter.com/KaufmanRoni
​
let r_base = 1;
let r_step = 70;
let circles = [];
​
let margin = 18;
let l = 10; // smol line length
​
let palette = ["#f47a9d", "#f4ea7a", "#72d8e5"];
​
function setup() {
  createCanvas(600, 600);
  strokeWeight(3);
  background(250);
}
​
function draw() {
  let origin = createVector(width/2, height/2);
  for (let i = 0; i < sq(r_base); i++) {
    let r0 = random(r_step) + r_base;
    let theta = random(TWO_PI);
    let pos = p5.Vector.fromAngle(theta, r0).add(origin);
    let r = r_step+random(-1, 1);
    let new_circle = {
      r: r,
      pos: pos
    }
    if (can_add(new_circle)) {
      draw_circle(pos.x, pos.y, r);
      circles.push(new_circle);
    }
  }
  
  try_add_smol_line();
  try_add_smol_circle();
  
  r_base += r_step;
  r_step *= 0.85;
  if (r_step < 2*l) {
    for (let i = 0; i < 300; i++) {
      try_add_smol_line();
      try_add_smol_circle();
    }
    noLoop();
  }
}
​
function can_add(new_c) {
  let x = new_c.pos.x;
  let y = new_c.pos.y;
  let r = new_c.r;
  for (let c of circles) {
    if (c.pos.dist(new_c.pos) < c.r + r + margin) {
      return false;
    }
  }
  return (x+r < width-margin) && (x-r > margin) && (y+r < height-margin) && (y-r > margin);
}
​
function draw_circle(x, y, r) {
  noStroke();
  fill(random(palette));
  push();
  translate(x, y);
  rotate(random(TWO_PI));
  circle(0, 0, 2*r);
  stroke("#1c2249");
  let n = 2*floor(sqrt(r))-2;
  for (let theta = 0; theta < TWO_PI; theta += TWO_PI/n) {
    line((r-l/2)*cos(theta), (r-l/2)*sin(theta), (r+l/2)*cos(theta), (r+l/2)*sin(theta));
  }
  pop();
}
​
function try_add_smol_line() {
  let x = random(margin, width-margin);
  let y = random(margin, height-margin);
  let pos = createVector(x, y);
  let new_circle = {
    r: l,
    pos: pos
  }
  if (can_add(new_circle)) {
    draw_smol_line(x, y);
    circles.push(new_circle);
  }
}
​
function draw_smol_line(x, y) {
  stroke("#1c2249");
  push();
  translate(x, y);
  rotate(random(TWO_PI));
  line(-l/2, 0, l/2, 0);
  pop();
}
​
function try_add_smol_circle() {
  let x = random(margin, width-margin);
  let y = random(margin, height-margin);
  let pos = createVector(x, y);
  let new_circle = {
    r: l/2,
    pos: pos
  }
  if (can_add(new_circle)) {
    noStroke();
    fill(random(palette));
    circle(x, y, l);
    circles.push(new_circle);
  }
}