/*
  *Blink
  *Turns an LED on for one second, then off for one second, repeatedly.
  *The circuit:
  * LED connected from digital pin 13 to ground.
  * Note: On most Arduino boards, there is already an LED on the board
  * connected to pin 13, so you don't need any extra components for this example.

  *Created 1 June 2005
  *By David Cuartielles
  *http://arduino.cc/en/Tutorial/Blink
  *based on an original by H. Barragan for the Wiring i/o board
*/

int ledPin = 13;     // LED connected to digital pin 13

// The setup() method runs once, when the sketch starts

void setup()
{
  // initialize the digital pin as an output:
  pinMode(ledPin, OUTPUT);
}

// the loop() method runs over and over again,
// as long as the Arduino has power

void loop()
{
  digitalWrite(ledPin, HIGH);   // set the LED on
  delay(1000);                  // wait for a second
  digitalWrite(ledPin, LOW);    // set the LED off
  delay(1000);                  // wait for a second
}