Arduino - Hello World

/*
  Hello World
 
  Function
  Turns on an LED on for one second, then off for one second, repeatedly.
  Outputs the current status to the serial port
 
  Peter J Francis  
 
 */

void setup() {                
  // initialize the digital pin as an output.
  // Pin 13 has an LED connected on most Arduino boards
  // Set up the serial port for comms @ 9600 baud
 
  pinMode(13, OUTPUT);  // set the pin as an OUTPUT
Serial.begin(9600);   // Opens serial port and sets it to 9600baud  
}

void loop() {
  // this loop runs continuiously
  digitalWrite(13, HIGH);   // set the LED on
  Serial.println("LED is ON"); // sends LED is ON to the serial port
  delay(1000);              // wait for a second
  digitalWrite(13, LOW);    // set the LED off
  Serial.println("LED is OFF");  // sends LED is OFF to the serial port
  delay(1000);              // wait for a second
}