// Example 01 : Blinking LED
//
// Copy and paste this example into an empty Arduino sketch

#define LED 13   // LED connected to
                // digital pin 13

void setup()
{
  pinMode(LED, OUTPUT);    // sets the digital
                           // pin as output
}

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