int pinledRouge = 23;
int pinledVerte = 22;
int pinledOrange = 21;

void setup() {
  pinMode(pinledRouge, OUTPUT);
  pinMode(pinledVerte, OUTPUT);
  pinMode(pinledOrange, OUTPUT);
}

void loop() {
  // Feu rouge
  digitalWrite(pinledRouge, HIGH);
  digitalWrite(pinledVerte, LOW);
  digitalWrite(pinledOrange, LOW);
  delay(2000);
  digitalWrite(pinledRouge, LOW);

  // Feu orange
  digitalWrite(pinledRouge, LOW);
  digitalWrite(pinledVerte, LOW);
  digitalWrite(pinledOrange, HIGH);
  delay(1000);
  digitalWrite(pinledOrange, LOW);

  // Feu vert
  digitalWrite(pinledRouge, LOW);
  digitalWrite(pinledVerte, HIGH);
  digitalWrite(pinledOrange, LOW);
  delay(3000);
  digitalWrite(pinledVerte, LOW);
}