#include "Pitches.h"

    /************************/

    /** PIN CONFIGURATIONS **/

    /************************/

    #define led 13
    #define buzzer 3
    #define echoPin A0
    #define pingPin 10

    // roughly 2.6 feet
    #define detectionDistance 80

    void setup() {
      //Serial.begin(9600);

      pinMode(led, OUTPUT);
      pinMode(buzzer, OUTPUT);
      pinMode(pingPin, OUTPUT);
      pinMode(echoPin, INPUT);
    }