#include <Keypad.h>
#include <Password.h>

#define rows 4
#define cols 3

#define keyLED 11
#define correctLED 12
#define wrongLED 13

char keys[rows][cols] = {
  {&#039;1&#039;,&#039;2&#039;,&#039;3&#039;},
  {&#039;4&#039;,&#039;5&#039;,&#039;6&#039;},
  {&#039;7&#039;,&#039;8&#039;,&#039;9&#039;},
  {&#039;*&#039;,&#039;0&#039;,&#039;#&#039;}
};

byte rowPins[rows] = {2,3,4,5};
byte colPins[cols] = {6,7,8};

Keypad keypad = Keypad(makeKeymap(keys),rowPins,colPins,rows,cols);

Password password = Password("1234");

void setup() {
  pinMode(keyLED,OUTPUT);
  pinMode(correctLED,OUTPUT);
  pinMode(wrongLED,OUTPUT);
}

void loop() {
  byte counter = 0;
       char key = keypad.getKey();
    if(key != NO_KEY && key != &#039;#&#039; ) {
      blinkLED(keyLED);
      password.(key);
      counter++;
    }

  if( key==&#039;#&#039;)
  {
  if(password.evaluate()) {
    blinkLED(correctLED);
  }
  else {
    blinkLED(wrongLED);
  }
  password.reset();
}
}

void blinkLED(byte ledPin) {
  digitalWrite(ledPin,HIGH);
  delay(200);
  digitalWrite(ledPin,LOW);
}