Arduino

#include <Password.h>

#include <Wire.h>
#include <LCD.h>
#include <LiquidCrystal.h>
#include <LiquidCrystal_I2C.h>
#include <LiquidCrystal_SI2C.h>


#include <Keypad.h>
#include <Servo.h>

int greenLight = 11;
int redLight = 12;
int servoPin = 3;
int amount1 = 0;

char pass[5];
char realPass[5] = "2601";

#define int servoPin = 13;
#define I2C_ADDR 0x27
#define BACKLIGHT_PIN 3
#define En_pin 2
#define Rw_pin 1
#define Rs_pin 0
#define D4_pin 4
#define D5_pin 5
#define D6_pin 6
#define D7_pin 7

const byte rows = 4; //four rows
const byte cols = 4; //three columns
char keys[rows][cols] = {
  {'1','2','3', 'A'},
  {'4','5','6', 'B'},
  {'7','8','9', 'C'},
  {'*','0','#', 'D'}
};

byte rowPins[rows] = {9,8,7,6}; //connect to the row pinouts of the keypad
byte colPins[cols] = {5,4,3,2}; //connect to the column pinouts of the keypad
Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, rows, cols );

Servo Servo1;

LiquidCrystal_I2C lcd(I2C_ADDR, En_pin,Rw_pin,Rs_pin,D4_pin,D5_pin,D6_pin,D7_pin);

void setup()
{
   lcd.begin(16,2);
   Serial.begin(9600);
   lcd.setBacklightPin(BACKLIGHT_PIN,POSITIVE);
   lcd.setBacklight(HIGH);
   Servo1.attach(servoPin);
   Servo1.write(0);
}


void loop()
{
  char key  = keypad.getKey();
  char dataDump[2];
  bool correct = true;

  lcd.setCursor(0, 0);
  lcd.print("Enter Password:");
  lcd.setCursor(0, 1);

  if(key != NO_KEY)
  {
      if(amount1 != 4)
      {
        pass[amount1] = key;
        amount1++;
        Serial.println(pass);
        lcd.setCursor(0,1);
        lcd.print(pass);
      }

      if(amount1 == 4)
      {
        delay(1000);
        amount1 = 0;


        for(int i = 0; i <= sizeof(realPass); i++)
        {
          if(pass[i] != realPass[i] && correct)
          {
            correct = false;
          }
          else
          {
            correct = true;
          }
        }

        if(correct)
        {
          memset(pass, 0, sizeof(pass));
          lcd.setCursor(0,0);
          lcd.print("Correct!       ");
          digitalWrite(greenLight, HIGH);
          delay(1500);
          digitalWrite(greenLight, LOW);
        }
        else
        {
          memset(pass, 0, sizeof(pass));
          lcd.setCursor(0,0);
          lcd.print("Incorrect!     ");
          lcd.setCursor(0,1);
          lcd.print("          ");
          digitalWrite(redLight, HIGH);
          delay(1500);
          digitalWrite(redLight, LOW);
        }
      }
   }
}