void setup() {
  // put your setup code here, to run once:

}

class button() {
  public:
  int button1 = 22;
  int button2 = 23;
  int button3 = 24;
};

class 7segment() {
  public:
  void display(numberToDisplay) {
    //bcd code
  }
};

class led() {
  public:
  int led1 = 4;
  int led2 = 5;
  int led3 = 6;
};

class detectors() {
  public:
  int detector1b = 25;
  int detector1t = 26;
  int detector1b = 27;
  int detector2t = 28;
  int detector3b = 29;
  int detector3t = 30;
};

void loop() {
  // put your main code here, to run repeatedly:

}