#include "pitches.h"
const int segmentPins[7] = {2, 3, 4, 5, 6, 7, 8};
const int buzzerPin = 9; // Pin connected to the buzzer
const int digit[10][7] = {
  {0, 0, 0, 0, 0, 0, 1}, // 0
  {1, 0, 0, 1, 1, 1, 1}, // 1
  {0, 0, 1, 0, 0, 1, 0}, // 2
  {0, 0, 0, 0, 1, 1, 0}, // 3
  {1, 0, 0, 1, 1, 0, 0}, // 4
  {0, 1, 0, 0, 1, 0, 0}, // 5
  {0, 1, 0, 0, 0, 0, 0}, // 6
  {0, 0, 0, 1, 1, 1, 1}, // 7
  {0, 0, 0, 0, 0, 0, 0}, // 8
  {0, 0, 0, 0, 1, 0, 0}  // 9
};

// Notes of the melody
int melody[] = {
  NOTE_E4, NOTE_E4, NOTE_E4, // Jingle bells, jingle bells, jingle all the way
  NOTE_E4, NOTE_E4, NOTE_E4, // Jingle bells, jingle bells, jingle all the way
  NOTE_E4, NOTE_G4, NOTE_C4, NOTE_D4, NOTE_E4, // Oh, what fun it is to ride
  NOTE_F4, NOTE_F4, NOTE_F4, NOTE_F4, NOTE_F4, NOTE_E4, NOTE_E4, NOTE_E4, NOTE_E4, // In a one-horse open sleigh
  NOTE_E4, NOTE_D4, NOTE_D4, NOTE_E4, NOTE_D4, NOTE_G4 // Hey, jingle bells
};

// Note durations: 4 = quarter note, 8 = eighth note, etc.
int noteDurations[] = {
  8, 8, 4, // Jingle bells, jingle bells, jingle all the way
  8, 8, 4, // Jingle bells, jingle bells, jingle all the way
  8, 8, 8, 8, 4, // Oh, what fun it is to ride
  8, 8, 8, 8, 8, 8, 8, 8, 8, // In a one-horse open sleigh
  8, 8, 8, 8, 8, 8 // Hey, jingle bells
};

void setup() {
  for (int i = 0; i < 7; i++) {
    pinMode(segmentPins[i], OUTPUT);
  }
  pinMode(buzzerPin, OUTPUT); // Set the buzzer pin as output
  noTone(buzzerPin); // Ensure the buzzer is off initially
}

void loop() {
  for (int number = 9; number >= 0; number--) {
    displayNumber(number);
    delay(1000); // Wait for 1 second
  }
  playMelody(); // Play "Jingle Bells" melody
}

void displayNumber(int number) {
  for (int i = 0; i < 7; i++) {
    digitalWrite(segmentPins[i], digit[number][i]);
  }
}

void playMelody() {
  for (int thisNote = 0; thisNote < sizeof(melody) / sizeof(melody[0]); thisNote++) {
    int noteDuration = 1000 / noteDurations[thisNote];
    tone(buzzerPin, melody[thisNote], noteDuration);
    int pauseBetweenNotes = noteDuration * 1.30;
    delay(pauseBetweenNotes);
    noTone(buzzerPin);
  }
}