// Mendeklarasikan pin untuk LED
int led1 = 8;  // LED 1 terhubung ke pin 8
int led2 = 9;  // LED 2 terhubung ke pin 9
int led3 = 10; // LED 3 terhubung ke pin 10

void setup() {
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
}

void loop() {
  // LED 1 ON, LED 2 & 3 OFF
  digitalWrite(led1, HIGH);
  digitalWrite(led2, LOW);
  digitalWrite(led3, LOW);
  delay(500);  // Tunggu selama 500 milidetik

  // LED 2 ON, LED 1 & 3 OFF
  digitalWrite(led1, LOW);
  digitalWrite(led2, HIGH);
  digitalWrite(led3, LOW);
  delay(500);  // Tunggu selama 500 milidetik

  // LED 3 ON, LED 1 & 2 OFF
  digitalWrite(led1, LOW);
  digitalWrite(led2, LOW);
  digitalWrite(led3, HIGH);
  delay(500);  // Tunggu selama 500 milidetik
}