int led_3 = 3; //led dioda mora biti spojena na PWM
int tipkalo_4 = 4; //brojac proizvoda
int tipkalo_5 = 5; //starter trake
int tipkalo_6 = 6;
int brojac = 0;
//while se koristi za beskonacno vrtenje, a for za neki interval
void setup() {
  // put your setup code here, to run once:
  pinMode(led_3, OUTPUT);
  pinMode(tipkalo_4, INPUT_PULLUP);
  pinMode(tipkalo_5, INPUT_PULLUP);
  digitalWrite(led_3, LOW);
  Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:

  while (digitalRead(tipkalo_5) == HIGH) //dok prekidac 2 nije pritisnut traka je u pogonu
  {
    delay(200);
  }
  Serial.println("Proizvodna traka je u pogonu");
  digitalWrite(led_3, HIGH);
  brojac = 0;
  while (brojac < 6)
  {
    if (digitalRead(tipkalo_4 == LOW))
  {
    delay(200);
      brojac++;
    
  }}
  Serial.println("Proizvodna traka je napunjena");
  digitalWrite(led_3, LOW);
}