How to make keypad door lock

1#include <Keypad.h>
2
3int lock_pin = A0; 
4int unlock_pin = A1;
5int  green_led = 11; 
6int blue_led = 12; 
7int red_led = 13;
8int j = 0;
9
10const  int ROW_NUM = 4; //four rows
11const int COLUMN_NUM = 3; //three columns
12
13char  keys[ROW_NUM][COLUMN_NUM] = {
14  {'1', '2', '3'},
15  {'4', '5', '6'},
16  {'7',  '8', '9'},
17  {'*', '0', '#'}
18};
19
20byte pin_rows[ROW_NUM] = {9, 8, 7,  6}; //connect to the row pinouts of the keypad
21byte pin_column[COLUMN_NUM] =  {5, 4, 3}; //connect to the column pinouts of the keypad
22
23Keypad keypad =  Keypad( makeKeymap(keys), pin_rows, pin_column, ROW_NUM, COLUMN_NUM );
24
25const  String password = "432"; // change your password here
26String input_password;
27
28void  setup() {
29
30  pinMode(lock_pin, OUTPUT); 
31  pinMode(unlock_pin, OUTPUT);
32  pinMode(green_led, OUTPUT); 
33  pinMode(blue_led, OUTPUT);
34  pinMode(red_led,  OUTPUT);
35
36  Serial.begin(9600);
37  input_password.reserve(32); // maximum  input characters is 33, change if needed
38}
39
40void loop() {
41  char key  = keypad.getKey();
42
43  if (key) {
44    Serial.println(key);
45
46    if  (key == '*') {
47      input_password = ""; // clear input password
48    }  else if (key == '#') {
49      if (password == input_password) {
50        Serial.println("password  is correct");
51Serial.println(input_password);
52        if (j == 0)
53        {
54          digitalWrite(lock_pin, HIGH); 
55          digitalWrite(green_led, HIGH);
56          delay(1000);
57          digitalWrite(lock_pin, LOW);
58          digitalWrite(green_led,  LOW);
59          j = 1;
60        }
61        else if (j == 1)
62        {
63          digitalWrite(unlock_pin, HIGH);
64          digitalWrite(blue_led, HIGH);  
65         delay(500);
66          digitalWrite(unlock_pin, LOW);
67          digitalWrite(blue_led,  LOW);
68          j = 0;
69        }
70
71      } else {
72        Serial.println("password  is incorrect, try again");
73         digitalWrite(red_led, HIGH); //..the green  LED not..
74         delay(500);
75          digitalWrite(red_led, LOW);
76      }
77
78      input_password = ""; // clear input password
79    } else {
80      input_password  += key; // append new character to input password string
81    }
82  }
83}
84