// Deklarasi pin LED
int led1 = 12;
int led2 = 11;
int led3 = 10;

void setup() {
  // Atur pin LED sebagai output
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
}

void loop() {
  // LED 1 menyala
  digitalWrite(led1, HIGH);
  delay(500); // Tunggu 500ms
  digitalWrite(led1, LOW);

  // LED 2 menyala
  digitalWrite(led2, HIGH);
  delay(500);
  digitalWrite(led2, LOW);

  // LED 3 menyala
  digitalWrite(led3, HIGH);
  delay(500);
  digitalWrite(led3, LOW);
}