const int ledPin = 9; // You can change this to any digital pin

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

void loop() {
    // Turn the LED on
    digitalWrite(ledPin, HIGH);
    delay(1000); // Wait for 1 second (1000 milliseconds)

    // Turn the LED off
    digitalWrite(ledPin, LOW);
    delay(1000); // Wait for 1 second (1000 milliseconds)
}