struct Color {
  int red;
  int green;
  int blue;
  (Color) -> Color f
}

Color rot(Color c1) {
  var c2 = new Color{ red = c1.green; green = c1.blue; blue = c1.red; f = c1.f };
  return c2;
}

global c = new Color { red = 10; green = 20; blue = 30 ; f = rot};

int program (int argc, string[] argv) {
  return c.f(c).red;
}