#include <Keypad.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);
const int greenLed = 11;
const int redLed = 10;
const uint8_t ROWS = 4;
const uint8_t COLS = 4;
char keys[ROWS][COLS] = {
  { '1', '2', '3', 'A' },
  { '4', '5', '6', 'B' },
  { '7', '8', '9', 'C' },
  { '*', '0', '#', 'D' }
};
uint8_t colPins[COLS] = { 5, 4, 3, 2 }; // Pins connected to C1, C2, C3, C4
uint8_t rowPins[ROWS] = { 9, 8, 7, 6 }; // Pins connected to R1, R2, R3, R4

Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);

String inputSecretCode() {
  lcd.setCursor(5, 1);
  lcd.print("[____]");
  lcd.setCursor(6, 1);
  String result = "";
  while (result.length() < 4) {
    char key = keypad.getKey();
    if (key >= '0' && key <= '9') {
      lcd.print('*');
      result += key;
    }
  }
  return result;
}

void setup() {
   pinMode(greenLed, OUTPUT);
   pinMode(redLed, OUTPUT);
   Serial.begin(9600);
  lcd.begin(16, 2);
  lcd.backlight();
  {lcd.setCursor(1, 0);
   lcd.print("Tere Tulemast");
   delay(1000);
   lcd.clear();
  } 
}

void loop() {
  char key = keypad.getKey
 if (key == '#') {            // If the '#' key is pressed
    lcd.clear();               // Clear any previous text
    lcd.print("Hash Pressed!"); // Display message
    delay(5000);               // Wait for 5 seconds
    lcd.clear();    
  }
  
  
 
  

}