// Variable for the Microphone
int MIC = A2;
//Variable for the Blue LED
int BLUELED = D0;
//Variable for the Orange LED
int ORANGELED = D6;
//Variable for the Red LED
int REDLED = D7;
// Variable to read the value of the sensor
int VALUE;
// Variable to determine the current LED
int CURRENTLED = BLUELED;

void setup () {
  //Here I define the Microphone as input and the led as output
  pinMode (MIC, INPUT);
  pinMode (BLUELED, OUTPUT);
  pinMode (ORANGELED, OUTPUT);
  pinMode (REDLED, OUTPUT);
}

void loop() {
  VALUE = digitalRead(MIC);  // This would turn off the First LED (BLue one) when it heard a sound
 if (VALUE == HIGH) {
  digitalWrite(CURRENTLED, LOW);

  if (CURRENTLED == BLUELED){  
    CURRENTLED = ORANGELED;
    /* If the blue led was the current one, for the next time the sensor heard a 
    sound, the next "current LED" would be the orange one*/
  }else if (CURRENTLED == ORANGELED) {
    CURRENTLED = REDLED;
    /* The same change would happen once the orange became the current, the next would be the red LED*/
   }else if (CURRENTLED == REDLED) {
    CURRENTLED = BLUELED;
    /* Finally, it would go back to the blue one to repeat the loop */
  }

  digitalWrite(CURRENTLED,HIGH);
  delay(200);
  }
}