int potPin = A0;
int ledPins[] = {2, 3, 4, 5, 6, 7, 8};

void setup() {
  for (int i = 0; i < 7; i++) {
    pinMode(ledPins[i], OUTPUT); 
  }
}

void loop() {
  int potValue = analogRead(potPin); 
  int activeLeds = map(potValue, 0, 1023, 0, 7); 

  for (int i = 0; i < 7; i++) {
    if (i < activeLeds) {
      digitalWrite(ledPins[i], HIGH); 
    } else {
      digitalWrite(ledPins[i], LOW); 
    }
  }
}