#define POT_PIN A0
const int ledPins[8] = {3, 4, 5, 6, 7, 8, 9, 10};
int currentLED = 0;

unsigned long previousMillis = 0; 
int delayTime = 50; 

void setup() {
  for (int i = 0; i < 8; i++) {
    pinMode(ledPins[i], OUTPUT);
    digitalWrite(ledPins[i], LOW);
  }
  digitalWrite(ledPins[currentLED], HIGH); 
}

void loop() {
  int potValue = analogRead(POT_PIN);
  delayTime = map(potValue, 0, 1023, 50, 2000);  

  if (millis() - previousMillis >= delayTime) {
    previousMillis = millis();
    
    digitalWrite(ledPins[currentLED], LOW); 
    currentLED = (currentLED + 1) % 8; 
    digitalWrite(ledPins[currentLED], HIGH); 
  }
}