#define trigPin 12
#define echoPin 13

void setup()
{
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
}

void loop()
{
  long duration, distance;
  
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  
  duration = pulseIn(echoPin, HIGH);
  distance = (duration/2) * 0.0343642; // distance = (duration/2) / 29.1;
  
  //ovdje pisati kod
  
  delay(500);
}