const int ledPins[] = {2, 3, 4, 5};  // Tableau des numéros de broches
int potentiometerPin = A0;           
int potentiometerValue = 0;          
int ledIndex = 0;                   // Index du DEL allume

unsigned long currentTime = 0;
unsigned long serialPrevious = 0;
int serialDelay = 1000;

void setup() {
  Serial.begin(9600);
  for (int i = 0; i < 4; i++) {
    // Initialisation des DEL en sortie
    pinMode(ledPins[i], OUTPUT); 
  }
}

void loop() {
  currentTime = millis();

  potentiometerValue = analogRead(potentiometerPin);
  
  if (potentiometerValue < 256) {
    digitalWrite(ledPins[0], HIGH);
    digitalWrite(ledPins[1], LOW);
    digitalWrite(ledPins[2], LOW);
    digitalWrite(ledPins[3], LOW);
  } else if (potentiometerValue < 512) {
    digitalWrite(ledPins[0], LOW);
    digitalWrite(ledPins[1], HIGH);
    digitalWrite(ledPins[2], LOW);
    digitalWrite(ledPins[3], LOW);
  } else if (potentiometerValue < 768) {
    digitalWrite(ledPins[0], LOW);
    digitalWrite(ledPins[1], LOW);
    digitalWrite(ledPins[2], HIGH);
    digitalWrite(ledPins[3], LOW);
  } else {
    digitalWrite(ledPins[0], LOW);
    digitalWrite(ledPins[1], LOW);
    digitalWrite(ledPins[2], LOW);
    digitalWrite(ledPins[3], HIGH);
  }

  if (currentTime - serialPrevious >= serialDelay) {
    serialPrevious = currentTime;
    Serial.print("Valeur : ");
    Serial.println(potentiometerValue);    
  }  
}