Need some help figuring out my code

/*************************************************
 * Public Constants define notes
 *************************************************/

#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 ledpins
const int rLed1 = 0;
const int rLed2 = 1;
const int rLed3 = 2;
const int rLed4 = 3;
const int rLed5 = 4;
const int rLed6 = 5;
const int wLed1 = 6;
const int wLed2 = 7;
const int wLed3 = 8;
const int wLed4 = 9;
const int wLed5 = 12;
const int wLed6 = 13;
const int buttonPin = 10;
const int buzzerPin = 11;
//define intervals
const int blinkDuration = 2000;
const int buttonInterval = 300;
const int wLedInterval = 2000;
const int wLedInterval2 = 6000;
const int rLedInterval = 4000;
const int rLedInterval2 = 8000;
const int aLedInterval = 10000;
//define millis
unsigned long currentMillis = 0;
unsigned long previousRLedMillis = 0;
unsigned long previousRLedMillis2 = 0;
unsigned long previousWLedMillis = 0;
unsigned long previousWLedMillis2 = 0;
unsigned long previousALedMillis = 0;
unsigned long previousButtonMillis = 0;
unsigned long previousMelodyMillis = 0;
//define pinstates
byte rLedState = LOW;
byte wLedState = LOW;
byte aLedState = LOW;
byte buttonState = LOW;
// melody of the song
int melody[] = {
  NOTE_E5, NOTE_E5, NOTE_E5,
  NOTE_E5, NOTE_E5, NOTE_E5,
  NOTE_E5, NOTE_G5, NOTE_C5, NOTE_D5,
  NOTE_E5,
  NOTE_F5, NOTE_F5, NOTE_F5, NOTE_F5,
  NOTE_F5, NOTE_E5, NOTE_E5, NOTE_E5, NOTE_E5,
  NOTE_E5, NOTE_D5, NOTE_D5, NOTE_E5,
  NOTE_D5, NOTE_G5

};
// tempo of the song
int tempo[] = {
  8, 8, 4,
  8, 8, 4,
  8, 8, 8, 8,
  2,
  8, 8, 8, 8,
  8, 8, 8, 16, 16,
  8, 8, 8, 8,
  4, 4

};


// make pins input/output
void setup() {
  Serial.begin(6900);
  Serial.println("Starting kerstboomprog.ino");
  Serial.print("buttonState = ");
  Serial.println(buttonState);

  pinMode(rLed1, OUTPUT);
  pinMode(rLed2, OUTPUT);
  pinMode(rLed3, OUTPUT);
  pinMode(rLed4, OUTPUT);
  pinMode(rLed5, OUTPUT);
  pinMode(rLed6, OUTPUT);
  pinMode(wLed1, OUTPUT);
  pinMode(wLed2, OUTPUT);
  pinMode(wLed3, OUTPUT);
  pinMode(wLed4, OUTPUT);
  pinMode(wLed5, OUTPUT);
  pinMode(wLed6, OUTPUT);
  pinMode(buttonPin, INPUT_PULLUP);
  pinMode(buzzerPin, OUTPUT);
}


void loop() {
//define currentmillis and calls functions
  currentMillis = millis();

  readButton();
  updatewLedState();
  updatewLedState2();
  updaterLedState();
  updaterLedState2();
  switchLeds();
  song();
 }
//updates ledstate of white leds
void updatewLedState() {
 if (buttonState == LOW){
   if (wLedState == LOW){
     if (currentMillis - previousWLedMillis >= wLedInterval){
       wLedState = HIGH;
       previousWLedMillis += wLedInterval;
      }
    }
    else {
     if (currentMillis - previousWLedMillis >= blinkDuration) {
       wLedState = LOW;
       previousWLedMillis += blinkDuration;
      }
    }
  }
}
//second update of white leds
void updatewLedState2() {
 if (buttonState == LOW){
   if (wLedState == LOW){
     if (currentMillis - previousWLedMillis2 >= wLedInterval2){
       wLedState = HIGH;
       previousWLedMillis2 += wLedInterval2;
      }
    }
    else {
     if (currentMillis - previousWLedMillis2 >= blinkDuration) {
       wLedState = LOW;
       previousWLedMillis2 += blinkDuration;
      }
    }
  }
}
//update red leds
void updaterLedState() {
 if (buttonState == LOW){
   if (rLedState == LOW){
     if (currentMillis - previousRLedMillis >= rLedInterval){
       rLedState = HIGH;
       previousRLedMillis += rLedInterval;
      }
    }
    else {
     if (currentMillis - previousRLedMillis >= blinkDuration) {
       rLedState = LOW;
       previousRLedMillis += blinkDuration;
      }
    }
  }
}

//updates second red led state
void updaterLedState2() {
 if (buttonState == LOW){
   if (rLedState == LOW){
     if (currentMillis - previousRLedMillis2 >= rLedInterval2){
       rLedState = HIGH;
       previousRLedMillis2 += rLedInterval2;
      }
    }
    else {
     if (currentMillis - previousRLedMillis2 >= blinkDuration) {
       rLedState = LOW;
       previousRLedMillis2 += blinkDuration;
      }
    }
  }
}
//updates state for all leds
void updateaLedState() {
 if (buttonState == LOW){
   if (aLedState == LOW){
     if (currentMillis - previousALedMillis >= aLedInterval){
       aLedState = HIGH;
       previousALedMillis += aLedInterval;
      }
    }
    else {
     if (currentMillis - previousALedMillis >= blinkDuration) {
       wLedState = LOW;
       previousALedMillis += blinkDuration;
      }
    }
  }
}

// turns on the leds
void switchLeds() {

      digitalWrite(rLed1, rLedState);
      digitalWrite(rLed2, rLedState);
      digitalWrite(rLed3, rLedState);
      digitalWrite(rLed4, rLedState);
      digitalWrite(rLed5, rLedState);
      digitalWrite(rLed6, rLedState);
      digitalWrite(wLed1, wLedState);
      digitalWrite(wLed2, wLedState);
      digitalWrite(wLed3, wLedState);
      digitalWrite(wLed4, wLedState);
      digitalWrite(wLed5, wLedState);
      digitalWrite(wLed6, wLedState);
      digitalWrite(rLed1, aLedState);
      digitalWrite(rLed2, aLedState);
      digitalWrite(rLed3, aLedState);
      digitalWrite(rLed4, aLedState);
      digitalWrite(rLed5, aLedState);
      digitalWrite(rLed6, aLedState);
      digitalWrite(wLed1, aLedState);
      digitalWrite(wLed2, aLedState);
      digitalWrite(wLed3, aLedState);
      digitalWrite(wLed4, aLedState);
      digitalWrite(wLed5, aLedState);
      digitalWrite(wLed6, aLedState);

}
//checks for button
void readButton(){
  if(millis() - previousButtonMillis >= buttonInterval){
    if(digitalRead(buttonPin) == LOW){
      buttonState = ! buttonState;
      Serial.print ("buttonState = ");
      Serial.println (buttonState);
    }
  }
}
 //define the pausebetween notes and note duration
void song(){
  if(buttonState == LOW){
  int size = sizeof(melody) / sizeof(int);
    for (int thisNote = 0; thisNote < size; thisNote++) {

      // to calculate the note duration, take one second
      // divided by the note type.
      //e.g. quarter note = 1000 / 4, eighth note = 1000/8, etc.
      int noteDuration = 1000 / tempo[thisNote];

      tone(buzzerPin, melody[thisNote], noteDuration);

      // to distinguish the notes, set a minimum time between them.
      // the note's duration + 30% seems to work well:
      unsigned long pauseBetweenNotes = noteDuration * 1.30;
      if (currentMillis - previousMelodyMillis >= pauseBetweenNotes) {
        previousMelodyMillis = currentMillis;
        noTone(buzzerPin);
   
      }
    }
  }
}
// make buzzer play note
void buzzer(int targetPin, long frequency, long length) {
  if(buttonState == LOW){
  digitalWrite(buzzerPin, HIGH);
  long delayValue = 1000 / frequency / 2; // calculate the delay value between transitions
  unsigned long previousMillis2 = 0;
  //// 1 second's worth of microseconds, divided by the frequency, then split in half since
  //// there are two phases to each cycle
  long numCycles = frequency * length / 1000; // calculate the number of cycles for proper timing
  //// multiply frequency, which is really cycles per second, by the number of seconds to
  //// get the total number of cycles to produce
  for (long i = 0; i < numCycles; i++) { // for the calculated length of time...
    if(currentMillis - previousMillis2>= delayValue){
      previousMillis2 = currentMillis;
    digitalWrite(targetPin, HIGH); // write the buzzer pin high to push out the diaphram
    }
    if(currentMillis - previousMillis2>= delayValue){
      previousMillis2 = currentMillis;
    digitalWrite(targetPin, LOW); // write the buzzer pin high to push out the diaphram
    }
  }
  digitalWrite(buzzerPin, LOW);

}
}


I'm stuck now. The code compiles but when I try it out it just does nothing close to what I want (turn white leds on for 2s then red for 2 then white for 2 then red for 2 then all for 2 repeat, and play the song at the same time once the button is pressed)

I stole the song from someone else but I feel this might be what is destroying the code. I'll have to write the song myself just using the tone function for simplicitys sake

does someone see what I did wrong here?