void setup() {
  Serial.begin(9600);                   // Start serial communication at 9600 baud
  pinMode(LED_BUILTIN, OUTPUT);          // Initialize the LED_BUILTIN pin as an output
  Serial.println("Setup complete");
}

void loop() {
  digitalWrite(LED_BUILTIN, HIGH);      // Turn the LED on (HIGH is on)
  Serial.println("LED ON");
  delay(1000);                          // Wait for 1 second

  digitalWrite(LED_BUILTIN, LOW);       // Turn the LED off (LOW is off)
  Serial.println("LED OFF");
  delay(1000);                          // Wait for 1 second
}