const int ledPin = 13; // Pin number for the LED (use built-in LED on most Arduino boards)

void setup() {
  pinMode(ledPin, OUTPUT); // Set the LED pin as an output
}

void loop() {
  digitalWrite(ledPin, HIGH); // Turn the LED on
  delay(500); // Wait for 500 milliseconds (0.5 seconds)
  digitalWrite(ledPin, LOW); // Turn the LED off
  delay(500); // Wait for another 500 milliseconds (0.5 seconds)
}