BASIC LED BLINK PROGRAM:
// the arduino board contains an LED internally connected to pin 13.
// to test any arduino board, a basci blink program is used
//that program can be found directly in the examples in ARDUINO IDE
// here goes our program
int led = 13;
// the setup routine runs once when you press reset:
void setup() {
// initialize the digital pin as an output.
pinMode(led, OUTPUT);
}
// the loop routine runs over and over again forever:
void loop() {
digitalWrite(led, HIGH); // turn the LED on (HIGH is the voltage level)
delay(1000); // wait for a second
digitalWrite(led, LOW); // turn the LED off by making the voltage LOW
delay(1000); // wait for a second
}