#include <Bounce2.h>
const int pinP1 = 8;
const int pinP2 = 9;
const int pinLed1 = 10;
const int pinLed2 = 11;
const int pinLed3 = 12;
// dichiaro due pulsanti "virtuali" con debunce
Bounce2::Button P1 = Bounce2::Button();
Bounce2::Button P2 = Bounce2::Button();

int numeroFase = 1;
void setup() {
 
  P1.attach(pinP1, INPUT_PULLUP);
  P2.attach(pinP2, INPUT_PULLUP);
  int indiceLed;
  for ( indiceLed = pinLed1; indiceLed <= pinLed3; indiceLed++) {
    pinMode(indiceLed, OUTPUT);
    digitalWrite(indiceLed, LOW);
  }
}
void loop() {
 
  P1.update();
  P2.update();
 
  if ( P1.fell() ) {

    numeroFase = numeroFase + 1;
 
    if (numeroFase > 3) {
      numeroFase = 1;
    }
  }

  if ( P2.fell() ) {
    numeroFase = 1;
  }

  switch (numeroFase) {
  case 1:
     // fase 1
     digitalWrite(pinLed1, LOW);
     digitalWrite(pinLed2, LOW);
     digitalWrite(pinLed3, HIGH);
     break;
  case 2:
     // fase 2
     digitalWrite(pinLed1, LOW);
     digitalWrite(pinLed2, HIGH);
     digitalWrite(pinLed3, LOW);
     break;
  case 3:
     // fase 3
     digitalWrite(pinLed1, HIGH);
     digitalWrite(pinLed2, LOW);
     digitalWrite(pinLed3, LOW);
     break;  
  }

}