// LED Blink Program for Arduino Uno
const int ledPin = 13; // Use built-in LED (or connect LED to a digital pin)

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

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