const byte trig = 12, echo = 11;
unsigned long sure;
int uzaklik;

void setup() {
  pinMode(trig, OUTPUT);
  pinMode(echo, INPUT); 
 
          Serial.begin(9600);
}

void loop() {
  digitalWrite(trig, 0);
  delayMicroseconds(10);
  digitalWrite(trig, 1);
  delayMicroseconds(10);
  sure = pulseInLong(echo, 1);
  uzaklik = (0.0343 * sure) / 2;
  Serial.print(uzaklik);
  Serial.println("cm");

}