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int ledPin = 13;
//led for visualization (use 13 for built-in led)

int speakerPin = 11;
//speaker connected to one of the PWM ports

#define c 261
#define d 294
#define e 329
#define f 349
#define g 391
#define gS 415
#define a 440
#define aS 455
#define b 466
#define cH 523
#define cSH 554
#define dH 587
#define dSH 622
#define eH 659
#define fH 698
#define fSH 740
#define gH 784
#define gSH 830
#define aH 880
//frequencies for the tones we're going to use
//used http://home.mit.bme.hu/~bako/tonecalc/tonecalc.htm to get these

void setup() 	 
{ 	 
  pinMode(ledPin, OUTPUT);
  // sets the ledPin to be an output
  pinMode(speakerPin, OUTPUT); 	
  //sets the speakerPin to be an output
} 	 
  	 
void loop() 	// run over and over again
{
  march();
} 	 
  	 
void beep (unsigned char speakerPin, int frequencyInHertz, long timeInMilliseconds)
{ 
    digitalWrite(ledPin, HIGH);	 
    //use led to visualize the notes being played
    
    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);
    //set led back to low
    
    delay(20);
    //a little delay to make all notes sound separate
} 	 
  	 
void march()
{ 	 
    //for the sheet music see:
    //http://www.musicnotes.com/sheetmusic/mtd.asp?ppn=MN0016254
    //this is just a translation of said sheet music to frequencies / time in ms
    //used 500 ms for a quart note
    
    beep(speakerPin, a, 500); 
    beep(speakerPin, a, 500);     
    beep(speakerPin, a, 500); 
    beep(speakerPin, f, 350); 
    beep(speakerPin, cH, 150);
    
    beep(speakerPin, a, 500);
    beep(speakerPin, f, 350);
    beep(speakerPin, cH, 150);
    beep(speakerPin, a, 1000);
    //first bit
    
    beep(speakerPin, eH, 500);
    beep(speakerPin, eH, 500);
    beep(speakerPin, eH, 500);    
    beep(speakerPin, fH, 350); 
    beep(speakerPin, cH, 150);
    
    beep(speakerPin, gS, 500);
    beep(speakerPin, f, 350);
    beep(speakerPin, cH, 150);
    beep(speakerPin, a, 1000);
    //second bit...
    
    beep(speakerPin, aH, 500);
    beep(speakerPin, a, 350); 
    beep(speakerPin, a, 150);
    beep(speakerPin, aH, 500);
    beep(speakerPin, gSH, 250); 
    beep(speakerPin, gH, 250);
    
    beep(speakerPin, fSH, 125);
    beep(speakerPin, fH, 125);    
    beep(speakerPin, fSH, 250);
    delay(250);
    beep(speakerPin, aS, 250);    
    beep(speakerPin, dSH, 500);  
    beep(speakerPin, dH, 250);  
    beep(speakerPin, cSH, 250);  
    //start of the interesting bit
    
    beep(speakerPin, cH, 125);  
    beep(speakerPin, b, 125);  
    beep(speakerPin, cH, 250);      
    delay(250);
    beep(speakerPin, f, 125);  
    beep(speakerPin, gS, 500);  
    beep(speakerPin, f, 375);  
    beep(speakerPin, a, 125); 
    
    beep(speakerPin, cH, 500); 
    beep(speakerPin, a, 375);  
    beep(speakerPin, cH, 125); 
    beep(speakerPin, eH, 1000); 
    //more interesting stuff (this doesn't quite get it right somehow)
    
    beep(speakerPin, aH, 500);
    beep(speakerPin, a, 350); 
    beep(speakerPin, a, 150);
    beep(speakerPin, aH, 500);
    beep(speakerPin, gSH, 250); 
    beep(speakerPin, gH, 250);
    
    beep(speakerPin, fSH, 125);
    beep(speakerPin, fH, 125);    
    beep(speakerPin, fSH, 250);
    delay(250);
    beep(speakerPin, aS, 250);    
    beep(speakerPin, dSH, 500);  
    beep(speakerPin, dH, 250);  
    beep(speakerPin, cSH, 250);  
    //repeat... repeat
    
    beep(speakerPin, cH, 125);  
    beep(speakerPin, b, 125);  
    beep(speakerPin, cH, 250);      
    delay(250);
    beep(speakerPin, f, 250);  
    beep(speakerPin, gS, 500);  
    beep(speakerPin, f, 375);  
    beep(speakerPin, cH, 125); 
           
    beep(speakerPin, a, 500);            
    beep(speakerPin, f, 375);            
    beep(speakerPin, c, 125);            
    beep(speakerPin, a, 1000);       
    //and we're done \รณ/    
}

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