int Shouyaib = 8;  // Red LED
int Aditto   = 9;  // Green LED
int Topon    = 10; // Blue LED
int Sifat    = 11; // White LED

void setup() {
  pinMode(Shouyaib, OUTPUT);
  pinMode(Aditto, OUTPUT);
  pinMode(Topon, OUTPUT);
  pinMode(Sifat, OUTPUT);
}

void loop() {
  // Shouyaib ON
  digitalWrite(Shouyaib, HIGH);
  delay(500);
  digitalWrite(Shouyaib, LOW);

  // Aditto ON
  digitalWrite(Aditto, HIGH);
  delay(500);
  digitalWrite(Aditto, LOW);

  // Topon ON
  digitalWrite(Topon, HIGH);
  delay(500);
  digitalWrite(Topon, LOW);

  // Sifat ON
  digitalWrite(Sifat, HIGH);
  delay(500);
  digitalWrite(Sifat, LOW);
}