   // since we are using 250 degrees/seconds range
   // -250 maps to a raw value of -32768
   // +250 maps to a raw value of 32767
-  
+
   float g = (gRaw * 250.0) / 32768.0;
   return g;
 }

NewPing sonar_1(TRIGGER_PIN_1, ECHO_PIN_1, MAX_DISTANCE);     // NewPing setup of closer sensor.
NewPing sonar_2(TRIGGER_PIN_2, ECHO_PIN_2, MAX_DISTANCE);     // NewPing setup of farther sensor.

// RGB
rgb_lcd lcd;

// MADGEWICK
// see https://www.arduino.cc/en/Tutorial/Genuino101CurieIMUOrientationVisualiser

void incrementPopulation() {
  population++;
  updatePopulationAndMoveCursor();
  lcd.setCursor(0, 1);
  lcd.print("Welcome!        ");
}

void decrementPopulation() {
