blooming

let nSym = 1;
function setup() {
  createCanvas(windowWidth * 0.9, windowHeight * 0.9);
  rectMode(CENTER);
  angleMode(DEGREES);
  noStroke();
  nCirc = int(random(10, 20));
  nRot = [];
  a1 = [];
  b1 = [];
  r1 = [];
  r2 = [];
  r3 = [];
  for (let i = 0; i < nCirc; i++) {
    a1[i] = random(width);
    b1[i] = random(0, 360);
    r1[i] = random(100, 255);
    r2[i] = random(200, 225);
    r3[i] = random(200, 255);
    nRot[i] = int(random(5, 40));
  }
}

function draw() {
  t = frameCount / 10;
  translate(width / 2, height / 2);
  background(10, 30, 40, 50);
  fill(255);
  push();
  rotate(t / 2);
  for (let k = 0; k < nSym; k++) {
    push();
    rotate((360 / nSym) * k);
    for (let j = 0; j < nCirc; j++) {
      push();
      translate((width / 6) * sin(t + b1[j]), (width / 6) * cos(t + b1[j]));
      for (let i = 0; i < nRot[j]; i++) {
        fill(
          r1[j] * abs(cos(t + b1[j])),
          r2[j] * abs(cos(t + b1[j])),
          r3[j] * abs(cos(t + b1[j])),
          90
        );
        a =
          a1[j] * sin(t) * cos(t / 3 + b1[j]) - (a1[j] / 2) * sin(t + nRot[j]);
        circle(
          a * cos(b1[j] + (i * 360) / nRot[j]),
          a * sin(b1[j] + (i * 360) / nRot[j]),
          a / 10
        );
        fill(
          (r1[j] / 2) * abs(cos(t + b1[j])),
          (r2[j] / 2) * abs(cos(t + b1[j])),
          (r3[j] / 2) * abs(cos(t + b1[j])),
          90
        );
        circle(
          a * cos(b1[j] + (i * 360) / nRot[j]),
          a * sin(b1[j] + (i * 360) / nRot[j]),
          a / 20
        );
      }
      pop();
    }
    pop();
  }
  pop();
  border();
}

function border() {
  push();
  noFill();
  stroke(20, 50, 60);
  strokeWeight(4);
  rect(0, 0, width - 20, height - 20);
  pop();
}

function mousePressed() {
  frameCount = 0;
  if (nSym < 20) {
    nSym++;
  } else {
    nSym = 1;
  }

  setup();
  draw();
}

function keyPressed() {
  trails = !trails;
}

function windowResized() {
  resizeCanvas(windowWidth * 0.9, windowHeight * 0.9);
}