void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(27, OUTPUT); // Set pin 27 as output
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(27, HIGH); // Turn on the LED connected to pin 27
  Serial.println("LED ON"); // Print message indicating LED is ON
  delay(1000); // Wait for 1 second
  digitalWrite(27, LOW); // Turn off the LED connected to pin 27
  Serial.println("LED OFF"); // Print message indicating LED is OFF
  delay(1000); // Wait for 1 second
}