#define relay 15

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, MasAtoqh!");
  pinMode(relay, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(relay, LOW);
  Serial.println("LED Kuning Menyala");
  Serial.println("LED Merah Mati");
  Serial.println("-------------------");
  delay(2000); 
  digitalWrite(relay, HIGH);
  Serial.println("LED Kuning Mati");
  Serial.println("LED Merah Menyala");
  Serial.println("-------------------");
  delay(2000); 
}