int pinLed = 4; // spremenljivka led, ki je tipa integer
void setup() {
  // put your setup code here, to run once:
  pinMode(pinLed, OUTPUT); // funkcija za krmiljenje pina; 
  // povemo ali bo nek pin vhod ali izhod

}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(pinLed, HIGH); //postavimo pin v "1"
  delay(800); // zakasnitev v ms
  digitalWrite(pinLed, LOW);
  delay(400);
}