long valor;
int LED_1=5;
int LED_2=4;
int LED_3=3;
int LED_4=2;
int buzzer=A0;
int pot=A1;

void setup() {
  pinMode(LED_1, OUTPUT);
  pinMode(LED_2, OUTPUT);
  pinMode(LED_3, OUTPUT);
  pinMode(LED_4, OUTPUT);
  pinMode (buzzer, OUTPUT);
  pinMode (pot, INPUT);
 Serial.begin(9600);
}
 
void loop() {
  
  valor = analogRead(A1); 

  if(valor >= 10 && valor <=255)
  {
      digitalWrite(LED_1, HIGH);
      digitalWrite(LED_2, LOW);
      digitalWrite(LED_3, LOW);
      digitalWrite(LED_4, LOW);
       Serial.print ("Do ");
  }

 if (digitalRead(LED_1)==HIGH){
   tone (buzzer, 523, 00);
   delay (500);
   noTone (buzzer);
    delay (1000);
 }

  if (valor >= 256 && valor <=511)
  {
      digitalWrite(LED_1, LOW);
      digitalWrite(LED_2, HIGH);
      digitalWrite(LED_3, LOW);
      digitalWrite(LED_4, LOW);
       Serial.print ("Re ");
  }
  if (digitalRead(LED_2)==HIGH){
   tone (buzzer, 587, 00);
   delay (500);
   noTone (buzzer);
    delay (1000);
  }
  if (valor >= 512 && valor <=767)
  {
      digitalWrite(LED_1, LOW);
      digitalWrite(LED_2, LOW);
      digitalWrite(LED_3, HIGH);
      digitalWrite(LED_4, LOW);
       Serial.print ("Mi ");
  }
  if (digitalRead(LED_3)==HIGH){
   tone (buzzer, 659, 00);
   delay (500);
   noTone (buzzer);
    delay (1000);
  }
 
  if (valor >= 768 && valor <=1023)
  {
      digitalWrite(LED_1, LOW);
      digitalWrite(LED_2, LOW);
      digitalWrite(LED_3, LOW);
      digitalWrite(LED_4, HIGH);
       Serial.print ("Fa ");
   }
  if (digitalRead(LED_4)==HIGH){
   tone (buzzer, 698, 00);
   delay (500);
   noTone (buzzer);
    delay (1000);
} 
}