// ghaisa yamanda TIK4

void setup() {
  // Atur pin LED sebagai output
  pinMode(13, OUTPUT);
  pinMode(12, OUTPUT);
  pinMode(11, OUTPUT);
}

void loop() {
  // Nyalakan LED 1
  digitalWrite(13, HIGH);
  delay(500);
  
  // Matikan LED 1 dan nyalakan LED 2
  digitalWrite(13, LOW);
  digitalWrite(12, HIGH);
  delay(500);
  
  // Matikan LED 2 dan nyalakan LED 3
  digitalWrite(12, LOW);
  digitalWrite(11, HIGH);
  delay(500);
  
  // Matikan LED 3
  digitalWrite(11, LOW);
  delay(500);
}