// note durations: 4 = quarter note, 8 = eighth note, etc.:

int Melody_Name_note[] = {
note1,  note2 ...
};

int Melody_Name_duration[] = {
2, 5 ...
};

Use a Subroutines

void Melody_Name()
{
  for (int thisNote = 0; thisNote < (sizeof(Melody_Name_note)/sizeof(int)); thisNote++) {
    int noteDuration = 1000 / Melody_Name_duration[thisNote]; //convert duration to time delay
    tone(8, Melody_Name_note[thisNote], noteDuration);
    int pauseBetweenNotes = noteDuration * 1.30;//Here 1.30 is tempo, decrease to play it faster
    delay(pauseBetweenNotes);
    noTone(8); //stop music on pin 8 
    }
}

int melody1_note[] = {

NOTE_E5, NOTE_G5, NOTE_F5, NOTE_E5, NOTE_D5, NOTE_C5, NOTE_E5, NOTE_D5, NOTE_C5, NOTE_B4, NOTE_A4, NOTE_B4, NOTE_C5, NOTE_G4,
NOTE_A4, NOTE_C5, NOTE_C5, NOTE_B4,
};

int melody1_duration[] = {
  2, 8, 8, 8, 8, 2, 8, 8, 8, 8, 
  4, 4, 4, 4, 4, 4, 4, 2
};


Twinkle Twinkle Little Star

int TwinkleStar_note[] = {
  NOTE_C4, NOTE_C4, NOTE_G4, NOTE_G4, NOTE_A4, NOTE_A4, NOTE_G4,
  NOTE_F4, NOTE_F4, NOTE_E4, NOTE_E4, NOTE_D4, NOTE_D4, NOTE_C4
};
int TwinkleStar_duration[] = {
  4, 4, 4, 4, 4, 4, 2,
  4, 4, 4, 4, 4, 4, 2
};

Jingle Bells

int JingleBells_note[] = {
  NOTE_E4, NOTE_E4, NOTE_E4, NOTE_E4,
  NOTE_E4, NOTE_E4, NOTE_E4, NOTE_G4,
  NOTE_C4, NOTE_D4, NOTE_E4, NOTE_F4,
  NOTE_F4, NOTE_F4, NOTE_F4, NOTE_F4,
  NOTE_E4, NOTE_E4, NOTE_E4, NOTE_E4
};
int JingleBells_duration[] = {
  200, 200, 400, 200,
  200, 400, 200, 200,
  200, 200, 200, 200,
  200, 400, 200, 200,
  200, 200, 200, 200
};

Happy Birthday

int HappyBirthday_note[] = {
  NOTE_C4, NOTE_C4, NOTE_D4, NOTE_C4, NOTE_F4, NOTE_E4,
  NOTE_C4, NOTE_C4, NOTE_D4, NOTE_C4, NOTE_G4, NOTE_F4,
  NOTE_C4, NOTE_C5, NOTE_C5, NOTE_A4, NOTE_F4, NOTE_E4, NOTE_D4, NOTE_AS4,
  NOTE_AS4, NOTE_A4, NOTE_F4, NOTE_G4, NOTE_F4
};
int HappyBirthday_duration[] = {
  4, 4, 4, 4, 4, 2,
  4, 4, 4, 4, 4, 2,
  4, 4, 4, 4, 4, 4, 4, 4,
  4, 4, 4, 4, 2
};

int Twinkle_note[] = {
  262, 262, 392, 392, 440, 440, 392,
  349, 349, 330, 330, 294, 294, 262,
  392, 392, 349, 349, 330, 330, 294,
  392, 392, 349, 349, 330, 330, 294,
  262, 262, 392, 392, 440, 440, 392,
  349, 349, 330, 330, 294, 294, 262
};
int Twinkle_duration[] = {
  4, 4, 4, 4, 4, 4, 2,
  4, 4, 4, 4, 4, 4, 2,
  4, 4, 4, 4, 4, 4, 2,
  4, 4, 4, 4, 4, 4, 2,
  4, 4, 4, 4, 4, 4, 2,
  4, 4, 4, 4, 4, 4, 2
};