int ledRouge = 12;
int ledJaune = 11;
int ledVert = 10;
int ledBleu = 9;

int Botao_1 = 7;
int Botao_2 = 6;
int Botao_3 = 5;
int Botao_4 = 4;

int State_1 = 0;
int State_2 = 0;
int State_3 = 0;
int State_4 = 0;

int Nota = 0;
int Buzzer = 13;

void setup() {
  pinMode(ledRouge, OUTPUT);
  pinMode(ledJaune, OUTPUT);
  pinMode(ledVert, OUTPUT);
  pinMode(ledBleu, OUTPUT);

  pinMode(Buzzer, OUTPUT);

  pinMode(Botao_1, INPUT);
  pinMode(Botao_2, INPUT);
  pinMode(Botao_3, INPUT);
  pinMode(Botao_4, INPUT);

}

void loop() {
  State_1 = digitalRead(Botao_1);
  State_2 = digitalRead(Botao_2);
  State_3 = digitalRead(Botao_3);
  State_4 = digitalRead(Botao_4);

  if(State_1 && !State_2 && !State_3 && !State_4){
    Nota = 80;
    digitalWrite(ledRouge, HIGH);

  }

  if(State_2 && !State_1 && !State_3 && !State_4){
    Nota = 160;
    digitalWrite(ledJaune, HIGH);

  }

  if(State_3 && !State_2 && !State_1 && !State_4){
    Nota = 240;
    digitalWrite(ledVert, HIGH);

  }

  if(State_4 && !State_2 && !State_3 && !State_1){
    Nota = 320;
    digitalWrite(ledBleu, HIGH);

  }

  if(Nota > 0){
    digitalWrite(Buzzer, HIGH);
    delayMicroseconds(Nota);
    digitalWrite(Buzzer, LOW);
    delayMicroseconds(Nota);
    Nota = 0;
    digitalWrite(ledRouge, LOW);
    digitalWrite(ledJaune, LOW);
    digitalWrite(ledVert, LOW);
    digitalWrite(ledBleu, LOW);
  }

}