int trigpin = 14 ;
int echopin = 13 ;

void setup() {
  // put your setup code here, to run once:
  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);

}