#define Relay_Pin 2

void setup() {
  // Set the relay pin as an OUTPUT
  pinMode(Relay_Pin, OUTPUT);

  // Start serial communication for debugging
  Serial.begin(9600);
}

void loop() {
  // Turn on the relay (LED) for 2 seconds
  digitalWrite(Relay_Pin, HIGH);
  Serial.println("Relay ON");
  delay(2000);

  // Turn off the relay (LED) for 2 seconds
  digitalWrite(Relay_Pin, LOW);
  Serial.println("Relay OFF");
  delay(2000);
}