Arduino combination lock

1// include the library code:
2#include <LiquidCrystal.h>
3#include  <Servo.h>
4
5// initialize the library by associating any needed LCD interface  pin
6// with the arduino pin number it is connected to
7const int rs = 12, en  = 11, d4 = A0, d5 = A1, d6 = A4, d7 = A2;
8LiquidCrystal lcd(rs, en, d4, d5, d6,  d7);
9
10int switch1 = 2;
11int switch2 = 3;
12int switch3 = 4;
13int switch4  = 5;
14int switch5 = 1;
15int switch6 = 0;
16
17Servo door;
18
19void setup()  {
20  // set up the LCD's number of columns and rows:
21  lcd.begin(16, 2);
22  //declare inputs
23  pinMode(switch1, INPUT);
24  pinMode(switch2, INPUT);
25  pinMode(switch3, INPUT);
26  pinMode(switch4, INPUT);
27  pinMode(switch5, INPUT);
28  pinMode(switch6, INPUT);
29  // set servo motor
30  door.attach(13);
31  door.write(90);
32}
33
34void  loop() {
35  switch1 = digitalRead(2);
36  switch2 = digitalRead(3);
37  switch3  = digitalRead(4);
38  switch4 = digitalRead(5);
39  switch6 = digitalRead(1);
40  if(switch1 && switch4 && switch6 == HIGH)
41  {
42    lcd.clear();
43    lcd.setCursor(0,1);
44    lcd.write("Door not lock");
45    door.write(180);
46    delay(5000);
47    door.write(90);
48  } else
49  {
50    lcd.clear();
51    door.write(90);
52    lcd.write("Door locked");
53  }for(int i = 0; i <= 3; i++)
54  {
55    delay(5000);
56   if(switch1 != HIGH && switch4 != HIGH && switch6 != HIGH)
57   {
58     lcd.clear();
59     lcd.write("Wait for 5 minutes");
60     delay(300000);
61   }
62  }
63}
64