const int trigPin =12;
const int echoPin =27;
void setup() {
  Serial.begin(115200);
    pinMode(trigPin, OUTPUT);
      pinMode(echoPin, INPUT);
      }

      void loop() {
        digitalWrite(trigPin, HIGH);
          delayMicroseconds(10);
            digitalWrite(trigPin, LOW);
              int duration =pulseIn(echoPin,HIGH);
                int distance =duration * 0.034/2;
                  Serial.println(distance);
                  }