#define NOTE_B0 31
#define NOTE_C1 33
#define NOTE_CS1 35
#define NOTE_D1 37
#define NOTE_DS1 39
#define NOTE_E1 41
#define NOTE_F1 44
#define NOTE_FS1 46
#define NOTE_G1 49
#define NOTE_GS1 52
#define NOTE_A1 55
#define NOTE_AS1 58
#define NOTE_B1 62
#define NOTE_C2 65
#define NOTE_CS2 69
#define NOTE_D2 73
#define NOTE_DS2 78
#define NOTE_E2 82
#define NOTE_F2 87
#define NOTE_FS2 93
#define NOTE_G2 98
#define NOTE_GS2 104

#define NOTE_A2 110
#define NOTE_AS2 117
#define NOTE_B2 123
#define NOTE_C3 131
#define NOTE_CS3 139
#define NOTE_D3 147
#define NOTE_DS3 156
#define NOTE_E3 165
#define NOTE_F3 175
#define NOTE_FS3 185
#define NOTE_G3 196
#define NOTE_GS3 208
#define NOTE_A3 220
#define NOTE_AS3 233
#define NOTE_B3 247
#define NOTE_C4 262
#define NOTE_CS4 277
#define NOTE_D4 294
#define NOTE_DS4 311
#define NOTE_E4 330
#define NOTE_F4 349
#define NOTE_FS4 370
#define NOTE_G4 392
#define NOTE_GS4 415
#define NOTE_A4 440
#define NOTE_AS4 466
#define NOTE_B4 494
#define NOTE_C5 523
#define NOTE_CS5 554
#define NOTE_D5 587
#define NOTE_DS5 622
#define NOTE_E5 659
#define NOTE_F5 698
#define NOTE_FS5 740
#define NOTE_G5 784
#define NOTE_GS5 831
#define NOTE_A5 880
#define NOTE_AS5 932
#define NOTE_B5 988
#define NOTE_C6 1047
#define NOTE_CS6 1109
#define NOTE_D6 1175
#define NOTE_DS6 1245
#define NOTE_E6 1319
#define NOTE_F6 1397
#define NOTE_FS6 1480
#define NOTE_G6 1568
#define NOTE_GS6 1661
#define NOTE_A6 1760
#define NOTE_AS6 1865
#define NOTE_B6 1976
#define NOTE_C7 2093
#define NOTE_CS7 2217
#define NOTE_D7 2349
#define NOTE_DS7 2489
#define NOTE_E7 2637
#define NOTE_F7 2794
#define NOTE_FS7 2960
#define NOTE_G7 3136
#define NOTE_GS7 3322
#define NOTE_A7 3520
#define NOTE_AS7 3729
#define NOTE_B7 3951
#define NOTE_C8 4186
#define NOTE_CS8 4435
#define NOTE_D8 4699
#define NOTE_DS8 4978
#define REST 0

const int melody[] PROGMEM = {                                                              //10                                                                                      20
  NOTE_E4, NOTE_B3, NOTE_C4, NOTE_D4, NOTE_C4, NOTE_B3, NOTE_A3, NOTE_A3, NOTE_C4, NOTE_E4, NOTE_D4, NOTE_C4, NOTE_B3, NOTE_B3, NOTE_C4, NOTE_D4, NOTE_E4, NOTE_C4, NOTE_A3, NOTE_A3, REST, 
  NOTE_D4, NOTE_F4, NOTE_A4, NOTE_G4, NOTE_F4, NOTE_E4, NOTE_C4, NOTE_E4, NOTE_D4, NOTE_C4, NOTE_B3, NOTE_B3, NOTE_C4, NOTE_D4, NOTE_E4, NOTE_C4, NOTE_A3, NOTE_A3, REST,
  NOTE_E4, NOTE_B3, NOTE_C4, NOTE_D4, NOTE_C4, NOTE_B3, NOTE_A3, NOTE_A3, NOTE_C4, NOTE_E4, NOTE_D4, NOTE_C4, NOTE_B3, NOTE_B3, NOTE_C4, NOTE_D4, NOTE_E4, NOTE_C4, NOTE_A3, NOTE_A3, REST, 
  NOTE_D4, NOTE_F4, NOTE_A4, NOTE_G4, NOTE_F4, NOTE_E4, NOTE_C4, NOTE_E4, NOTE_D4, NOTE_C4, NOTE_B3, NOTE_B3, NOTE_C4, NOTE_D4, NOTE_E4, NOTE_C4, NOTE_A3, NOTE_A3, REST,
  NOTE_E3, NOTE_C3, NOTE_D3, NOTE_B2, NOTE_C3, NOTE_A2, NOTE_GS2, NOTE_B2,
  NOTE_E3, NOTE_C3, NOTE_D3, NOTE_B2, NOTE_C3, NOTE_E3, NOTE_A3, NOTE_GS3, 
  REST, REST
};

const int noteDurations[] PROGMEM = {                       //20        //24              //30                          //40
  3, 6, 6, 3, 6, 6, 3, 6, 6, 3, 6, 6, 6, 3, 6, 3, 3, 3, 3, 3, 2, 3, 6, 3, 6, 6, 2, 6, 3, 6, 6, 3, 6, 6, 3, 3, 3, 3, 3, 3,
  3, 6, 6, 3, 6, 6, 3, 6, 6, 3, 6, 6, 6, 3, 6, 3, 3, 3, 3, 3, 2, 3, 6, 3, 6, 6, 2, 6, 3, 6, 6, 3, 6, 6, 3, 3, 3, 3, 3, 3,
  1, 1, 1, 1, 1, 1, 1, 1,
  1, 1, 1, 1, 3, 3, 1, 1, 
  2, 2
};                            //10
//second part starts at 20

int availableMemory() {
  int size = 2048; // SRAM for ATmega328p = 2048Kb
  byte *buf;
  while ((buf = (byte *) malloc (--size)) == NULL);
  free(buf);
  return size;
}

int buzzer = 2;
int noteIndex = 0;
unsigned long previousMillis = 0;
int totalDuration = 0;

void setup() {
  pinMode(buzzer, OUTPUT);
}

void loop() {
  unsigned long currentMillis = millis();
  int noteDuration = 1000 / pgm_read_word_near(noteDurations + noteIndex);
  totalDuration += noteDuration;

  if (currentMillis - previousMillis >= totalDuration) {
    tone(buzzer, pgm_read_word_near(melody + noteIndex), noteDuration);

    int pauseBetweenNotes = noteDuration * 1.30;
    delay(pauseBetweenNotes);

    noTone(buzzer);

    noteIndex++;
    if (noteIndex >= sizeof(melody) / sizeof(int)) {
      noteIndex = 0;
      totalDuration = 0;
    }

    previousMillis = currentMillis;
  }
}