const int ledpin=13;

void setup() {
  // put your setup code here, to run once:
  pinMode(ledpin,OUTPUT);
  Serial.begin(9600);
}

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