  speaker/piezo for sound
  */
 
+#include <util/delay.h>
 #include <NewPing.h> // From https://code.google.com/p/arduino-new-ping/
 #include <NewTone.h> // From https://code.google.com/p/arduino-new-tone/
 

  }
}


    // Remeber when this ping was done, so we know when to do the next one.
    melody_last = millis_now;
    playMelody();
    
    // Check battery level
    long vcc = readVcc();
    Serial.print("Battery: ");
    Serial.println(vcc);
  }
  
}
