Processing Evolved

    function setup() {
  let canvas = createCanvas(600, 600, WEBGL);
  canvas.parent('animation-holder');
  resizeAnimation();
}

function draw() {
  background(sin(frameCount * 0.02) * 100 + 100, cos(frameCount * 0.03) * 100 + 100, sin(frameCount * 0.04) * 100 + 100);
  
  push();
  translate(0, sin(frameCount * 0.05) * 100);
  rotateX(frameCount * 0.03);
  rotateY(frameCount * 0.04);
  fill(255, 0, 0);
  square(-50, -50, 100);
  pop();
  
  push();
  translate(100, cos(frameCount * 0.06) * 80);
  rotateX(frameCount * 0.02);
  rotateZ(frameCount * 0.05);
  fill(255, 128, 0);
  square(-40, -40, 80);
  pop();

  for (let i = 0; i < 5; i++) {
    push();
    translate(random(-width/2, width/2), random(-height/2, height/2), random(-200, 200));
    rotateX(frameCount * 0.01);
    rotateY(frameCount * 0.02);
    rotateZ(frameCount * 0.03);
    fill(255, 255, 255, 200);
    snowflake(0, 0, 30, 4);
    pop();
  }
}

function snowflake(x, y, size, levels) {
  let angle = TWO_PI / 6;
  for (let i = 0; i < 6; i++) {
    branch(x, y, size, levels);
    rotate(angle);
  }
}

function branch(x, y, size, levels) {
  if (levels === 0) {
    line(x, y, x + size, y);
  } else {
    branch(x, y, size / 3, levels - 1);
    translate(size / 3, 0);
    branch(0, 0, size / 3, levels - 1);
    translate(size / 3, 0);
    branch(0, 0, size / 3, levels - 1);
  }
}