int sensorPin = A3;  // input
int ledPin = 13;  
 int sensorValue = 0;
 
 
 ///
 int speakerPin = 9;

int length = 15; // the number of notes
char notes[] = "ccggaagffeeddc "; // a space represents a rest
int beats[] = { 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 4 };

int tempo = 50;


 
void setup() {

  for (int p = 0 ; p < 8 ; p++) {
    pinMode(p, OUTPUT);
  }
   pinMode(13, OUTPUT);
   pinMode(9, OUTPUT);

}

void loop() {




  sensorValue = analogRead(sensorPin); 
  digitalWrite(ledPin, HIGH);  
delay(sensorValue);  
digitalWrite(ledPin, LOW); 
delay(sensorValue);   
    //9
    digitalWrite(1,0); 
  digitalWrite(2,0); 
  digitalWrite(3,1);
  digitalWrite(4,0); 
  digitalWrite(5,0); 
  digitalWrite(6,0);
  digitalWrite(7,0);
    sensorValue= analogRead(sensorPin); 
  delay(sensorValue * 10 );   
  
  
  //8
    digitalWrite(1,0); 
  digitalWrite(2,0); 
  digitalWrite(3,0);
  digitalWrite(4,0); 
  digitalWrite(5,0); 
  digitalWrite(6,0);
  digitalWrite(7,0);
    sensorValue = analogRead(sensorPin); 
   delay(sensorValue * 10 );   
  
  
  //7
    digitalWrite(1,0); 
  digitalWrite(2,1); 
  digitalWrite(3,1);
  digitalWrite(4,1); 
  digitalWrite(5,0); 
  digitalWrite(6,0);
  digitalWrite(7,0);
    sensorValue = analogRead(sensorPin); 
  delay(sensorValue * 10 );   
  
    //6
    digitalWrite(1,0); 
  digitalWrite(2,0); 
  digitalWrite(3,0);
  digitalWrite(4,0); 
  digitalWrite(5,0); 
  digitalWrite(6,0);
  digitalWrite(7,1);
    sensorValue = analogRead(sensorPin); 
  delay(sensorValue * 10 );     
  
    
  //5
    digitalWrite(1,0); 
  digitalWrite(2,0); 
  digitalWrite(3,1);
  digitalWrite(4,0); 
  digitalWrite(5,0); 
  digitalWrite(6,0);
  digitalWrite(7,1);
    sensorValue = analogRead(sensorPin); 
  delay(sensorValue * 10 );   
  
  
  //4
    digitalWrite(1,0); 
  digitalWrite(2,1); 
  digitalWrite(3,1);
  digitalWrite(4,0); 
  digitalWrite(5,0); 
  digitalWrite(6,1);
  digitalWrite(7,0);
    sensorValue = analogRead(sensorPin); 
  delay(sensorValue * 10 );   
  
    //3
  digitalWrite(1,0); 
  digitalWrite(2,0); 
  digitalWrite(3,1);
  digitalWrite(4,0); 
  digitalWrite(5,1); 
  digitalWrite(6,0);
  digitalWrite(7,0);
    sensorValue = analogRead(sensorPin); 
  delay(sensorValue * 10 );   
  
    //2
  digitalWrite(1,1); 
  digitalWrite(2,0); 
  digitalWrite(3,0);
  digitalWrite(4,0); 
  digitalWrite(5,1); 
  digitalWrite(6,0);
  digitalWrite(7,0);
    sensorValue = analogRead(sensorPin); 
  delay(sensorValue * 10 );   


//1
  digitalWrite(1,0); 
  digitalWrite(2,1); 
  digitalWrite(3,1);
  digitalWrite(4,1); 
  digitalWrite(5,1); 
  digitalWrite(6,1);
  digitalWrite(7,0);
    sensorValue = analogRead(sensorPin); 
  delay(sensorValue * 10 );   


  //0
  digitalWrite(1,0); 
  digitalWrite(2,0); 
  digitalWrite(3,0);
  digitalWrite(4,1); 
  digitalWrite(5,0); 
  digitalWrite(6,0);
  digitalWrite(7,0);


  for (int i = 0; i < length; i++) {
    if (notes[i] == ' ') {
      sensorValue = analogRead(sensorPin) / 50; 
      delay(beats[i] * tempo * sensorValue); // rest
    } else {
      playNote(notes[i], beats[i] * tempo);
    }
    delay(tempo / 2); 
  }
/*
 playNote(notes[0], beats[0] * tempo);
    delay(tempo / 2); 
  */  
    digitalWrite(13,1);
    delay(sensorValue*500);
 digitalWrite(13,0);
     delay(sensorValue*500);
  digitalWrite(13,1);
    delay(sensorValue*500);
 digitalWrite(13,0);
    delay(sensorValue*500);
 digitalWrite(13,1);
    delay(sensorValue*500);
 digitalWrite(13,0);
    delay(sensorValue*500);
 digitalWrite(13,1);

}





void playTone(int tone, int duration) {
  for (long i = 0; i < duration * 1000L; i += tone * 2) {
    digitalWrite(speakerPin, HIGH);
    delayMicroseconds(tone);
    digitalWrite(speakerPin, LOW);
    delayMicroseconds(tone);
  }
}

void playNote(char note, int duration) {
  char names[] = { 'c', 'd', 'e', 'f', 'g', 'a', 'b', 'C' };
  int tones[] = { 1915, 1700, 1519, 1432, 1275, 1136, 1014, 956 };

  // play the tone corresponding to the note name
  for (int i = 0; i < 8; i++) {
    if (names[i] == note) {
      playTone(tones[i], duration);
    }
  }
}