#include <Keypad.h>

// Define the LED pin
const int ledPin = 10;
const int ledPin1= 11;
const int ledPin2= 12;
const int ledPin3= 13;

// Define the keypad size and keys
const byte ROWS = 4; // Four rows
const byte COLS = 4; // Four 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

// Create the Keypad object
Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);

void setup() {
  pinMode(ledPin, OUTPUT);
  pinMode(ledPin1, OUTPUT);
  pinMode(ledPin2, OUTPUT);
  pinMode(ledPin3, OUTPUT);
}

void loop() {
  char key = keypad.getKey();
  if (key) {
    if (key == '1') {
      digitalWrite(ledPin, HIGH);
      }
    if (key == '2') {
    digitalWrite(ledPin, HIGH);
    digitalWrite(ledPin1, HIGH); }

    if (key == '3') {
    digitalWrite(ledPin, HIGH);
    digitalWrite(ledPin1, HIGH);
    digitalWrite(ledPin2, HIGH); }

    if (key == '4') {
    digitalWrite(ledPin, HIGH);
    digitalWrite(ledPin1, HIGH);
    digitalWrite(ledPin2, HIGH);
    digitalWrite(ledPin3, HIGH);
    }

    if (key == 'A') {
    digitalWrite(ledPin, HIGH);
    delay(500);
    digitalWrite(ledPin, LOW);
    delay(500);
    digitalWrite(ledPin1, HIGH);
    delay(500);
    digitalWrite(ledPin1, LOW);
    delay(500);
    digitalWrite(ledPin2, HIGH);
    delay(500);
    digitalWrite(ledPin2, LOW);
    delay(500);
    digitalWrite(ledPin3, HIGH);
    delay(500);
    digitalWrite(ledPin3, LOW);
    delay(500);
    }

    if (key == 'B') {
    digitalWrite(ledPin3, HIGH);
    delay(500);
    digitalWrite(ledPin3, LOW);
    delay(500);
    digitalWrite(ledPin2, HIGH);
    delay(500);
    digitalWrite(ledPin2, LOW);
    delay(500);
    digitalWrite(ledPin1, HIGH);
    delay(500);
    digitalWrite(ledPin1, LOW);
    delay(500);
    digitalWrite(ledPin, HIGH);
    delay(500);
    digitalWrite(ledPin, LOW);
    delay(500);
    }

    if (key == '0') {
    digitalWrite(ledPin, LOW);
    digitalWrite(ledPin1,LOW);
    digitalWrite(ledPin2,LOW);
    digitalWrite(ledPin3,LOW);
}
}
}