// Define the LED pin
const int ledPin = 2;  // You can change this to the pin you're using for the LED

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

// Loop function
void loop() {
  // Turn the LED on (HIGH is the voltage level)
  digitalWrite(ledPin, HIGH);
  // Wait for a second
  delay(1000);
  // Turn the LED off by making the voltage LOW
  digitalWrite(ledPin, LOW);
  // Wait for a second
  delay(1000);
}