#include "pitches.h"
#define SPEAKER_PIN 8
#define SW 3
const uint8_t buttonPins[] = { 12, 11, 10, 9, 7, 6, 5, 4 };
const int buttonTones[] = {
                           NOTE_C4, NOTE_D4, NOTE_E4, NOTE_F4,
                           NOTE_G4, NOTE_A4, NOTE_B4, NOTE_C5,
                           NOTE_B4, NOTE_A4, NOTE_G4, NOTE_F4,
                           NOTE_E4, NOTE_D4, NOTE_C4
                           };
void setup() 
{
  pinMode(SW, INPUT_PULLUP);
  for (uint8_t i=0;i<8;i++) 
  {
    pinMode(buttonPins[i], INPUT_PULLUP);
  }
  pinMode(SPEAKER_PIN, OUTPUT);
}
void loop() 
{
  int pitch=0;
  if(digitalRead(SW)==0)
  {
    for(uint8_t i=0;i<15;i++)
    {
    tone(8,buttonTones[i]);
    delay(200);
    }
  }
  for(uint8_t i=0;i<8;i++)
  {
    if(digitalRead(buttonPins[i])==0) 
    {
      pitch=buttonTones[i];
    }
  }
  if (pitch) 
  {
    tone(SPEAKER_PIN,pitch);
  } 
  else 
  {
    noTone(SPEAKER_PIN);
  }
}