// PROGRAM: Blinking of inbuilt LED on the Arduino Board

int pin = 13;			// Arduino LED pin

void setup()
{
    Serial.begin(9600);
    pinMode (pin,OUTPUT);	// Defining the Mode of the Pin. Here the pin mode is OUPUT
}

void loop()			// Looping Part
{
    digitalWrite (pin, HIGH);   // Giving the pin HIGH voltage i.e. 'ON'
    delay (500);		// The Led will delay the output by 500 microsecond
    digitalWrite (pin, LOW);	// Giving the pin LOW Voltage i.e. 'OFF'
    delay (500);		// The Led will delay the output by 500 microsecond
}