gistfile1.txt

void setup() {
  // initialize digital pin LED_BUILTIN as an output.
  pinMode(LED_BUILTIN, OUTPUT);
  Serial.begin(9600);
}

// the loop function runs over and over again forever
void loop() {
  digitalWrite(LED_BUILTIN, HIGH);   // turn the LED on
  Serial.println("ON");
  delay(500);                       // wait for half a second
  digitalWrite(LED_BUILTIN, LOW);    // turn the LED off
  Serial.println("OFF");
  delay(500);                       // wait for half a second

}