text: // Global Variables (Constant)
  const int btn_pin_1 = A1; //Defines button A1 to variable.
  const int btn_pin_2 = A2; //Defines button A2 to variable.
  const int btn_pin_3 = A3; //Defines button A3 to variable.
  const int spk_pin_1 = 5;  //Defines pin for external speaker component.
  // Global Variables (Changing)
  int btn_sta_1 = A1; //Defines button switch state variable for A1.
  int btn_sta_2 = A2; //Defines button switch state variable for A2.
  int btn_sta_3 = A3; //Defines button switch state variable for A3.
  bool flagState = false; //Defines flagState to toggle button logic.
  bool flagArmed = false; //Defines flagState to check if alarm is armed.
  bool flagAlarm = false; //Defines flagState if alarm is triggered.
  
  //Run Init Setups (Configuring pins)
  void PinSetup_init(){
    // defines the input button pins to input mode.
    pinMode(btn_pin_1, INPUT); //Defines pin mode of sw_pin_1 (A1)
    pinMode(btn_pin_2, INPUT); //Defines pin mode of sw_pin_2 (A2)
    pinMode(btn_pin_3, INPUT); //Defines pin mode of sw_pin_3 (A3)
  }
  
  void MFShield_init(){
     Timer1.initialize();
     MFS.initialize(&Timer1);
     MFS.write("----");
     delay(250);
     MFS.write("BOOT");
     delay(250);
  }
  