#define pinPotensio A0
#define led1 2
#define led2 3
#define led3 4   // perbaikan: ganti led4 jadi led3

void setup() {
  Serial.begin(9600);
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
}

void loop() {
  int adcValue = analogRead(pinPotensio);  // baca ADC 0–1023
  Serial.print("ADC: ");
  Serial.println(adcValue);

  if (adcValue > 5 && adcValue < 100) {
    digitalWrite(led1, HIGH);
    digitalWrite(led2, LOW);
    digitalWrite(led3, LOW);
  }
  else if (adcValue >= 100 && adcValue < 300) {
    digitalWrite(led1, HIGH);
    digitalWrite(led2, HIGH);
    digitalWrite(led3, LOW);
  }
  else if (adcValue >= 300 && adcValue < 500) {
    digitalWrite(led1, HIGH);
    digitalWrite(led2, HIGH);
    digitalWrite(led3, HIGH);
  }
  else {
    // kalau di luar range → semua mati
    digitalWrite(led1, LOW);
    digitalWrite(led2, LOW);
    digitalWrite(led3, LOW);
  }

  delay(200);
}