#include "pitches.h"

const int PA4 = 0;
const int PA5 = 1;
const int PA7 = 3;

int sw = 1;

int melody[] = {
  NOTE_C3,NOTE_D3,NOTE_E3,NOTE_F3,NOTE_E3,NOTE_D3,NOTE_C3,
  NOTE_E3,NOTE_F3,NOTE_G3,NOTE_A3,NOTE_G3,NOTE_F3,NOTE_E3,
  NOTE_C3,NOTE_C3,NOTE_C3,NOTE_C3,
  NOTE_C3,NOTE_D3,NOTE_E3,NOTE_F3,NOTE_E3,NOTE_D3,NOTE_C3
};

int len = 180;

int duration[] = {
  len,len,len,len,len,len,len*2,
  len,len,len,len,len,len,len*2,
  len*2,len*2,len*2,len*2,   
  len,len,len,len,len,len,len*2
};

int count = 0;

void setup() {
   Serial.begin(115200);
   pinMode(PA4, INPUT);
   pinMode(PA7, OUTPUT);
}


void loop() {
  sw = digitalRead(PA4);
  if (sw < 1 ){
    digitalWrite(PA7, HIGH);
    
    tone(PA5, melody[count], duration[count]);
    delay(duration[count] * 1.30);
    noTone(PA5);
    count = count + 1;
    if ( count > 24 ) {
      count = 0;
    }
  }
  noTone(PA5);
  digitalWrite(PA7, LOW);
  delay(200);
}