void rgb_propeller() {   //-m27-RGB PROPELLER
  idex++;
  int N3  = int(NUM_LEDS / 3);
  int N6  = int(NUM_LEDS / 6);
  int N12 = int(NUM_LEDS / 12);
  for (int i = 0; i < N3; i++ ) {
    int j0 = (idex + i + NUM_LEDS + N12) % NUM_LEDS;
    int j1 = (j0 + N3) % NUM_LEDS;
    int j2 = (j1 + N3) % NUM_LEDS;
    leds[j0] = CHSV(255, 255, 255);//Red
    leds[j1] = CHSV(255, 0, 255);//White
    leds[j2] = CHSV(350, 255, 255);//Green

  }
  LEDS.show();
  delay(10);
}