A demonstration of the Perlin noise: the sky and cloud. / パーリンノイズのデモ：空と雲

SkyAndCloud.pde

void setup() {
  size(500, 500);
  colorMode(HSB, 360, 1.0, 1.0);
}

void draw() {
  for (int i = 0; i < width; i++) {
    for (int j = 0; j < height; j++) {
      stroke(210, noise(i / 60.0, j / 60.0, frameCount / 60.0), 1.0);
      point(i, j);
    }
  }
}