int ledPins[] = {2, 3};
int currentLED = 0;
int intensity = 0;
int step = 5; // Nilai ini mengontrol kecepatan berdenyut
unsigned long previousMillis = 0;
const long interval = 10;

void setup() {
  for (int i = 0; i < 2; i++) {
    pinMode(ledPins[i], OUTPUT);
  }
}

void loop() {
  unsigned long currentMillis = millis();
  
  if (currentMillis - previousMillis >= interval) {
    previousMillis = currentMillis;

    analogWrite(ledPins[currentLED], intensity);
    
    intensity += step;
    
    if (intensity >= 255 || intensity <= 0) {
      step = -step;
      currentLED = 1 - currentLED; // Bergantian antara LED 2 dan 3
    }
  }
}