Updated loop for CD77_Police_Lights

void loop() {

  // button management section
  myBtn.read();               // read the button
  if (myBtn.wasReleased())    // if the button was released, change the landingmode
  {
    landingMode++;
    if (landingMode > NUM_MODES) {    // Handle overflow of modes
      landingMode = 0;
    }
  }
  switch (landingMode) {
    case 0: cd77_police_lights_one_modified_n_dots(2, 4, 60, CRGB::Red); break;
    case 1: cd77_police_lights_one_modified_n_dots(2, 4, 60, CRGB::Blue); break;
  }
}