gistfile1.ino

/*
  Blink
  Turns on an LED on for one second, then off for one second, repeatedly.
 
  Most Arduinos have an on-board LED you can control. On the Uno and
  Leonardo, it is attached to digital pin 13. If you're unsure what
  pin the on-board LED is connected to on your Arduino model, check
  the documentation at http://arduino.cc
 
  This example code is in the public domain.
 
  modified 8 May 2014
  by Scott Fitzgerald
 */
 
 
// the setup function runs once when you press reset or power the board
void setup() {
  // initialize digital pin 13 as an output.
  pinMode(81, OUTPUT);
}
 
// the loop function runs over and over again forever
void loop() {
  digitalWrite(81, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(100);              // wait for a second
  digitalWrite(81, LOW);    // turn the LED off by making the voltage LOW
  delay(100);              // wait for a second
}