#define LEDrosso 4
#define LEDgiallo 3
#define LEDverde 2


void setup() {
  // put your setup code here, to run once:
pinMode(LEDrosso, OUTPUT);
pinMode(LEDgiallo, OUTPUT);
pinMode(LEDverde, OUTPUT);
digitalWrite(LEDrosso, LOW);
digitalWrite(LEDgiallo, LOW);
digitalWrite(LEDverde, LOW);
}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(LEDrosso, HIGH);
delay(1000);
digitalWrite(LEDrosso, LOW);
digitalWrite(LEDgiallo, HIGH);
delay(1000);
digitalWrite(LEDgiallo, LOW);
digitalWrite(LEDverde, HIGH);
delay(1000);
digitalWrite(LEDverde, LOW);
}