// This code will make the LED connected to pin 8 blink ON and OFF

void setup() {
  // Set pin 8 (built-in LED) as an OUTPUT
  pinMode(8, OUTPUT);
}

void loop() {
  // Turn the LED ON (HIGH means 5V)
  digitalWrite(8, HIGH);

  // Wait for 500 milliseconds (0.5 seconds)
  delay(500);

  // Turn the LED OFF (LOW means 0V)
  digitalWrite(8, LOW);

  // Wait again for 500 milliseconds
  delay(500);
}