#include <LiquidCrystal.h>

int Contrast = 60;
int button1 = 4;
int button2 = 3;
LiquidCrystal lcd(12, 11, 10, 9, 8, 7);

char hexValues[] = "0123456789ABCDEF"; // Array of hexadecimal values
int currentIndex = 0; // Current index in the array
int lcdPosition = 0; // Current LCD position

void setup() {
  pinMode(button1, INPUT);
  pinMode(button2, INPUT);
  analogWrite(8, Contrast);
  lcd.begin(16, 2);
  lcd.setCursor(0, 0);
  lcd.print("Enter Password:");
  lcd.setCursor(lcdPosition, 1);
  lcd.print(hexValues[currentIndex]);
}

void loop() {
  if (digitalRead(button1) == HIGH) {
    delay(200); // Debounce the button press

    currentIndex = (currentIndex + 1) % 16;
    lcd.setCursor(lcdPosition, 1);
    lcd.print(hexValues[currentIndex]);

    while (digitalRead(button1) == HIGH) {
      // Wait for the button to be released
    }
  }

  if (digitalRead(button2) == HIGH) {
    delay(200); // Debounce the button press

    lcdPosition = (lcdPosition + 1) % 16;

    if (lcdPosition == 0) {
      lcd.clear(); // Clear the LCD screen only if we're starting from the beginning
      lcd.setCursor(0, 0);
      lcd.print("Enter Password:");
    }

    currentIndex = 0; // Reset currentIndex to 0 after button2 is pressed

    lcd.setCursor(lcdPosition, 1);
    lcd.print(hexValues[currentIndex]);

    while (digitalRead(button2) == HIGH) {
      // Wait for the button to be released
    }
  }
}