//this code is written with the help of AI

#include <LiquidCrystal.h>

// Initialize the LCD (pins: RS, Enable, D4, D5, D6, D7)
LiquidCrystal lcd(7, 8, 9, 10, 11, 12);

// Pin configuration for buzzer
const int buzzerPin = 6;

// Define note frequencies
#define NOTE_C4  262
#define NOTE_D4  294
#define NOTE_E4  330
#define NOTE_F4  349
#define NOTE_G4  392
#define NOTE_A4  440

// Melody for "Twinkle, Twinkle, Little Star"
int melody[] = {
  NOTE_C4, NOTE_C4, NOTE_G4, NOTE_G4, NOTE_A4, NOTE_A4, NOTE_G4, // Line 1
  NOTE_F4, NOTE_F4, NOTE_E4, NOTE_E4, NOTE_D4, NOTE_D4, NOTE_C4, // Line 2
  NOTE_G4, NOTE_G4, NOTE_F4, NOTE_F4, NOTE_E4, NOTE_E4, NOTE_D4, // Line 3
  NOTE_G4, NOTE_G4, NOTE_F4, NOTE_F4, NOTE_E4, NOTE_E4, NOTE_D4, // Line 4
  NOTE_C4, NOTE_C4, NOTE_G4, NOTE_G4, NOTE_A4, NOTE_A4, NOTE_G4, // Line 5
  NOTE_F4, NOTE_F4, NOTE_E4, NOTE_E4, NOTE_D4, NOTE_D4, NOTE_C4  // Line 6
};

// Note durations: 4 = quarter note, 8 = eighth note, etc.
int noteDurations[] = {
  4, 4, 4, 4, 4, 4, 2,  // Line 1
  4, 4, 4, 4, 4, 4, 2,  // Line 2
  4, 4, 4, 4, 4, 4, 2,  // Line 3
  4, 4, 4, 4, 4, 4, 2,  // Line 4
  4, 4, 4, 4, 4, 4, 2,  // Line 5
  4, 4, 4, 4, 4, 4, 2   // Line 6
};

// Lyrics for each line
const char* lyrics[] = {
  "Twinkle, twinkle,",
  "little star,",
  "How I wonder",
  "what you are!",
  "Up above the",
  "world so high,",
  "Like a diamond",
  "in the sky.",
  "Twinkle, twinkle,",
  "little star,",
  "How I wonder",
  "what you are!"
};

void setup() {
  // Initialize the LCD
  lcd.begin(16, 2);

  // Display greeting
  lcd.setCursor(0, 0);
  lcd.print("   Twinkle,   ");
  lcd.setCursor(0, 1);
  lcd.print("Little Star...");
  delay(2000);
  lcd.clear();

  // Play the melody and display lyrics
  int melodyLength = sizeof(melody) / sizeof(melody[0]);
  int lyricIndex = 0;

  for (int i = 0; i < melodyLength; i++) {
    int noteDuration = 1000 / noteDurations[i];

    // Update lyrics line when necessary
    if (i % 7 == 0 && lyricIndex < 12) { // Change lyrics every 7 notes
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print(lyrics[lyricIndex]);
      if (lyricIndex + 1 < 12) {
        lcd.setCursor(0, 1);
        lcd.print(lyrics[lyricIndex + 1]);
      }
      lyricIndex += 2;
    }

    // Play the note
    tone(buzzerPin, melody[i], noteDuration);
    delay(noteDuration * 1.3); // Add a slight pause
  }

  // End song message
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Song Complete!");
}

void loop() {
  // Do nothing; the song only plays once
}