#include <LiquidCrystal_I2C.h>

const int potPin = A0;
const int ledPins[] = {2, 3, 4, 5, 6, 7, 8, 9};
const int ledSzam = 8;

void setup() {

  Serial.begin(115200);

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

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

  Serial.print("Potenciométer érték: ");
  Serial.println(potErtek);

  int ledBekapcs = map(potErtek, 0, 1023, 0, ledSzam);

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

  delay(50);
}