sketch_171224a_merry_xmas.pde

int num = 50;
PVector[] points = new PVector[num];

void setup() {
  size(320, 240);
  colorMode(HSB, 360, 100, 100, 100);
  noStroke();
  for (int i = 0; i < points.length; i++) {
    float x = random(width);
    float y = random(height);
    points[i] = new PVector(x, y);
  }
}

void draw() {
  randomSeed(100);
  background(0, 0, 0);
  for (PVector p : points) {
    float d = random(5, 35);
    float n = noise(p.x/5f, p.y/5f, frameCount/10f);
    float hue = map(n, 0, 1, 0, 60);
    fill(hue, 80, 100, 60);
    ellipse(p.x, p.y, d, d);
    p.x -= 1;
    if (p.x < 0) p.x += width;
  }
}