#include <Keypad.h>
#include <Stepper.h>

const int stepsPerRevolution = 200;
int GLED = 0;
int RLED = 1;
Stepper myStepper(stepsPerRevolution, 10, 11, 12, 13);
int DLAY = 250;
int Code = 250;
byte Entered;
const uint8_t ROWS = 4;
const uint8_t COLS = 4;
char keys[ROWS][COLS] = {
  { '1', '2', '3', 'A' },
  { '4', '5', '6', 'B' },
  { '7', '8', '9', 'C' },
  { '*', '0', '#', 'D' }
};

uint8_t colPins[COLS] = { 5, 4, 3, 2 }; // Pins connected to C1, C2, C3, C4
uint8_t rowPins[ROWS] = { 9, 8, 7, 6 }; // Pins connected to R1, R2, R3, R4

Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);

void setup() {
  pinMode (RLED,OUTPUT);
  pinMode (GLED,OUTPUT);
  myStepper.setSpeed(60);
  Serial.begin(9600);
digitalWrite (RLED,HIGH);
}

void loop() {
  char key = keypad.getKey();
Entered = Entered + key;

  if (key != NO_KEY) {
    Serial.println(key);
    if (Entered == 65) {
      goto LetterPass;
    }
    if (Entered == 68) {
      goto LockSeq;
    }
  else {
    digitalWrite (GLED,LOW);
    digitalWrite (RLED,HIGH);
    Serial.println("Access Denied");
  
}
  
  LetterPass:
  Entered = 0 + key;
  Serial.println (Entered);
  Serial.println();
  Serial.println(Entered);
  if (Entered == 35) {
    digitalWrite (GLED,HIGH);
    digitalWrite (RLED,LOW);
    myStepper.step(stepsPerRevolution);
    Serial.println("Access Granted");
    Entered = 0;
  }
  
  LockSeq:
   Entered = 0 + key;
   Serial.println (Entered);
   Serial.println();
   Serial.println(Entered);
   if (Entered == 42) {
    digitalWrite (GLED,LOW);
    digitalWrite (RLED,HIGH);
    myStepper.step(-stepsPerRevolution);
    Serial.println ("Locked");
    Entered = 0;
  }
}
}