new code

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

Servo myservo;



#define Password_Lenght 7 // Give enough room for six chars + NULL char

int pos = 0;    // variable to store the servo position

char Data[Password_Lenght]; // 6 is the number of chars it can hold + the null char = 7
char Master[Password_Lenght] = "123456";
byte data_count = 0, master_count = 0;
bool Pass_is_good;
char customKey;


const byte ROWS=4;
const byte COLS=4;

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};
byte colPins[COLS]={5,4,3,2};
bool door = true;

//connect to the column pinouts of the keypad

Keypad customKeypad   = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS); //initialize an instance of class NewKeypad

void setup()
{serial.begin(9600);
  myservo.attach(11);
  ServoClose();



}

void loop()
{

  if (door == 0)
  {
    customKey = customKeypad.getKey();

    serial.println(customKey);

    if (customKey == '#')

    {

      ServoClose();

      door = 1;
    }
  }

  else Open();
}

void clearData()
{
  while (data_count != 0)
  { // This can be used for any array size,
    Data[data_count--] = 0; //clear array for new data
  }
  return;
}

void ServoOpen()
{
  for (pos = 180; pos >= 0; pos -= 5) { // goes from 0 degrees to 180 degrees
    // in steps of 1 degree
    myservo.write(pos);              // tell servo to go to position in variable 'pos'
    delay(15);                       // waits 15ms for the servo to reach the position
  }
}

void ServoClose()
{
  for (pos = 0; pos <= 180; pos += 5) { // goes from 180 degrees to 0 degrees
    myservo.write(pos);              // tell servo to go to position in variable 'pos'
    delay(15);                       // waits 15ms for the servo to reach the position
  }
}

void Open()
{


  customKey = customKeypad.getKey();
  if (customKey) // makes sure a key is actually pressed, equal to (customKey != NO_KEY)
  {
    Data[data_count] = customKey; // store char into data array

    data_count++; // increment data array by 1 to store new char, also keep track of the number of chars entered
  }

  if (data_count == Password_Lenght - 1) // if the array index is equal to the number of expected chars, compare data to master
  {
    if (!strcmp(Data, Master)) // equal to (strcmp(Data, Master) == 0)
    {

      ServoOpen();

      door = 0;
    }
    else
    {

      delay(1000);
      door = 1;
    }
    clearData();
  }
}