int pinButton = 7;
int tipka;
int LED = 3;

void setup() {
  pinMode(pinButton, INPUT);
  pinMode(LED, OUTPUT);
}

void loop() {
  tipka = digitalRead(pinButton);
  if (tipka == LOW) digitalWrite(LED, LOW);
  else digitalWrite(LED, HIGH);
  delay(500);
}


/*
void setup() {
  pinMode(7, INPUT_PULLUP);
  Serial.begin(115200);
}

void loop() {
  tipka = digitalRead(pinButton);
  if (tipka == LOW) Serial.println("tipka pritisnjena");
  else Serial.println("tipka ni pritisnjena");
  delay(500);
}
*/