// 2009 mlab.uiah.fi/paja
// An example of flashing LED (Light Emitting Diode)
// PIN 13 ---> 220½ resistor ---> LED ---> GND

int  pinInt = 13;


void setup()
{
  Serial.begin(9600);
  pinMode(pinInt, OUTPUT);      // sets the digital pin as output
  
  // Try following codes first. LED is switched on once for 5 second.
  digitalWrite(pinInt, HIGH);
  // Delay pauses the program for the given time (milisecond).
  delay(5000);
  digitalWrite(pinInt, LOW);
}

void loop()
{
  
  // Try following codes second. LED flashes forever.
  /*
  digitalWrite(pinInt, HIGH);
  delay(500);
  digitalWrite(pinInt, LOW);
  delay(500);
  Serial.println("Flash!");
  */
}