#define LED1 18  // LED kanan
#define LED2 5  // LED kedua
#define LED3 17  // LED tengah
#define LED4 16  // LED keempat
#define LED5 4  // LED kiri

void setup() {
  pinMode(LED1, OUTPUT);
  pinMode(LED2, OUTPUT);
  pinMode(LED3, OUTPUT);
  pinMode(LED4, OUTPUT);
  pinMode(LED5, OUTPUT);
}

void loop() {
  // Dari kanan ke tengah
  digitalWrite(LED1, HIGH);
  delay(100);
  digitalWrite(LED1, LOW);

  digitalWrite(LED5, HIGH);
  delay(100);
  digitalWrite(LED5, LOW);

  digitalWrite(LED2, HIGH);
  delay(100);
  digitalWrite(LED2, LOW);

 digitalWrite(LED4, HIGH);
  delay(100);
  digitalWrite(LED4, LOW);

  digitalWrite(LED3, HIGH);
  delay(100);
  digitalWrite(LED3, LOW);

  digitalWrite(LED3, HIGH);
  delay(100);
  digitalWrite(LED3, LOW);
}