int trigpin=13;
int echopin=12;
//ultrasonicdecleration
void setup() {
  Serial.begin(115200);
  pinMode(trigpin, OUTPUT);
  pinMode(echopin,INPUT);
  //ultrasonic setup
}

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