// Program Gabungan: Running LED Aktif Saat Pushbutton Ditekan

#define L1 PB5
#define L2 PB6
#define L3 PB7
#define L4 PB8
#define SWITCH PA10

int button;

void setup() {
  pinMode(L1, OUTPUT);
  pinMode(L2, OUTPUT);
  pinMode(L3, OUTPUT);
  pinMode(L4, OUTPUT);
  pinMode(SWITCH, INPUT_PULLUP); // Tombol aktif LOW
}

void loop() {
  button = digitalRead(SWITCH);

  if (button == LOW) { // Pushbutton ditekan
    digitalWrite(L1, HIGH);
    digitalWrite(L2, LOW);
    digitalWrite(L3, LOW);
    digitalWrite(L4, LOW);
    delay(500);

    digitalWrite(L1, LOW);
    digitalWrite(L2, HIGH);
    digitalWrite(L3, LOW);
    digitalWrite(L4, LOW);
    delay(500);

    digitalWrite(L1, LOW);
    digitalWrite(L2, LOW);
    digitalWrite(L3, HIGH);
    digitalWrite(L4, LOW);
    delay(500);

    digitalWrite(L1, LOW);
    digitalWrite(L2, LOW);
    digitalWrite(L3, LOW);
    digitalWrite(L4, HIGH);
    delay(500);
  } else {
    // Pushbutton tidak ditekan, semua LED mati
    digitalWrite(L1, LOW);
    digitalWrite(L2, LOW);
    digitalWrite(L3, LOW);
    digitalWrite(L4, LOW);
  }
}