const int relayPin = 7; // Signal pin to the Relay

void setup() {
  pinMode(relayPin, OUTPUT);
  Serial.begin(9600);
  Serial.println("Relay Test Starting...");
}

void loop() {
  // Turn the Relay ON (Connects COM to NO)
  Serial.println("Status: Relay CLOSED (Bulb ON)");
  digitalWrite(relayPin, HIGH); 
  delay(2000);

  // Turn the Relay OFF (Disconnects COM from NO)
  Serial.println("Status: Relay OPEN (Bulb OFF)");
  digitalWrite(relayPin, LOW);  
  delay(2000);
}