const int ledPins[8] = {13, 12, 14, 27, 26, 25, 33, 32};
const int potPin = 34;

void setup() {
  for (int i = 0; i < 8; i++) {
    pinMode(ledPins[i], OUTPUT);
  }
  pinMode(potPin, INPUT);
}

void loop() {
  int potValue = analogRead(potPin);


  int level = map(potValue, 0, 4095, 0, 8);
  if (level > 8) level = 8;


  for (int i = 0; i < 8; i++) {
    digitalWrite(ledPins[i], (i < level) ? HIGH : LOW);
  }

  delay(50);
}