#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

int sensorPin = 0;
int speakerPin = 9;
int ledPin = 13;
int rPin = 6;
int gPin = 5;
int bPin = 3;


void setup()
{
  pinMode(rPin, OUTPUT);
  pinMode(gPin, OUTPUT);
  pinMode(bPin, OUTPUT);
  pinMode(speakerPin, OUTPUT);
  pinMode(ledPin, OUTPUT);

}

void loop()
{
  showSpectrum();

  song();

}

void song()  //here is where all the notes for the song are played.
{
  beep(speakerPin, NOTE_D5, 100);  //   beep( -PIN OF SPEAKER-, -THE NOTE WANTING TO BE PLAYED-, -DURATION OF THE NOTE IN MILISECONDS- )
  delay(80);
  beep(speakerPin, NOTE_F5, 100);
  delay(80);
  beep(speakerPin, NOTE_D6, 500);
  delay(250);

  beep(speakerPin, NOTE_D5, 100);
  delay(80);
  beep(speakerPin, NOTE_F5, 100);
  delay(80);
  beep(speakerPin, NOTE_D6, 500);
  delay(250);

  beep(speakerPin, NOTE_E6, 500);
  delay(100);
  beep(speakerPin, NOTE_F6, 100);
  delay(100);
  beep(speakerPin, NOTE_E6, 100);
  delay(80);
  beep(speakerPin, NOTE_F6, 100);
  delay(80);
  beep(speakerPin, NOTE_E6, 100);
  delay(80);
  beep(speakerPin, NOTE_C6, 100);
  delay(80);
  beep(speakerPin, NOTE_A5, 300);
  delay(300);

  beep(speakerPin, NOTE_A5, 200);
  delay(100);
  beep(speakerPin, NOTE_D5, 200);
  delay(100);
  beep(speakerPin, NOTE_F5, 100);
  delay(100);
  beep(speakerPin, NOTE_G5, 100);
  delay(100);
  beep(speakerPin, NOTE_A5, 300);
  delay(500);

  beep(speakerPin, NOTE_A5, 200);
  delay(100);
  beep(speakerPin, NOTE_D5, 200);
  delay(100);
  beep(speakerPin, NOTE_F5, 100);
  delay(100);
  beep(speakerPin, NOTE_G5, 100);
  delay(100);
  beep(speakerPin, NOTE_E5, 300);
  delay(500);



  beep(speakerPin, NOTE_D5, 100);
  delay(80);
  beep(speakerPin, NOTE_F5, 100);
  delay(80);
  beep(speakerPin, NOTE_D6, 400);
  delay(250);

  beep(speakerPin, NOTE_D5, 100);
  delay(80);
  beep(speakerPin, NOTE_F5, 100);
  delay(80);
  beep(speakerPin, NOTE_D6, 400);
  delay(250);

  beep(speakerPin, NOTE_E6, 200);
  delay(200);
  beep(speakerPin, NOTE_F6, 100);
  delay(100);
  beep(speakerPin, NOTE_E6, 100);
  delay(80);
  beep(speakerPin, NOTE_F6, 100);
  delay(80);
  beep(speakerPin, NOTE_E6, 100);
  delay(80);
  beep(speakerPin, NOTE_C6, 100);
  delay(80);
  beep(speakerPin, NOTE_A5, 300);
  delay(300);

  beep(speakerPin, NOTE_A5, 200);
  delay(100);
  beep(speakerPin, NOTE_D5, 200);
  delay(100);
  beep(speakerPin, NOTE_F5, 100);
  delay(100);
  beep(speakerPin, NOTE_G5, 100);
  delay(100);
  beep(speakerPin, NOTE_A5, 500);
  delay(100);
  beep(speakerPin, NOTE_A5, 200);
  delay(100);
  beep(speakerPin, NOTE_D5, 500);
  delay(2000);

}

void beep (unsigned char speakerPin, int frequencyInHertz, long timeInMilliseconds)  //code for working out the rate at which each note plays and the frequency.
{
  digitalWrite(ledPin, HIGH);
  int x;
  long delayAmount = (long)(1000000/frequencyInHertz);
  long loopTime = (long)((timeInMilliseconds*1000)/(delayAmount*2));
  for (x=0;x<loopTime;x++)
  {
    digitalWrite(speakerPin,HIGH);
    delayMicroseconds(delayAmount);
    digitalWrite(speakerPin,LOW);
    delayMicroseconds(delayAmount);
  }
  digitalWrite(ledPin, LOW);
  delay(20);
}

void showSpectrum()
{
  int x;

  // Now we'll use a for() loop to make x count from 0 to 767
  // (Note that there's no semicolon after this line!
  // That's because the for() loop will repeat the next
  // "statement", which in this case is everything within
  // the following brackets {} )

  for (x = 0; x < 768; x++)

  // Each time we loop (with a new value of x), do the following:

  {
    showRGB(x);  // Call RGBspectrum() with our new x
    delay(10);   // Delay for 10 ms (1/100th of a second)
  }
}

void showRGB(int color)
{
  int redIntensity;
  int greenIntensity;
  int blueIntensity;

  // Here we'll use an "if / else" statement to determine which
  // of the three (R,G,B) zones x falls into. Each of these zones
  // spans 255 because analogWrite() wants a number from 0 to 255.

  // In each of these zones, we'll calculate the brightness
  // for each of the red, green, and blue LEDs within the RGB LED.

  if (color <= 255)          // zone 1
  {
    redIntensity = 255 - color;    // red goes from on to off
    greenIntensity = color;        // green goes from off to on
    blueIntensity = 0;             // blue is always off
  }
  else if (color <= 511)     // zone 2
  {
    redIntensity = 0;                     // red is always off
    greenIntensity = 255 - (color - 256); // green on to off
    blueIntensity = (color - 256);        // blue off to on
  }
  else // color >= 512       // zone 3
  {
    redIntensity = (color - 512);         // red off to on
    greenIntensity = 0;                   // green is always off
    blueIntensity = 255 - (color - 512);  // blue on to off
  }

  // Now that the brightness values have been set, command the LED
  // to those values

  analogWrite(rPin, redIntensity);
  analogWrite(bPin, blueIntensity);
  analogWrite(gPin, greenIntensity);
}