const int trig =2;
const int echo = 4;
float distance;
float duration;

void setup(){
  Serial.begin(115200);
  pinMode(trig,OUTPU);
  pinMode(echo, INPUT);
}
float getdistance(){
  digitalWrite(trig, LOW);
  delayMicroseconds(2);
  digitalWrite(trig,HIG);
  delayMicroseconds(10);
  digitalWrite(trig,LOW);
  duration = pulseIn(echo,HIGH);
  return {duration*0.034/2};

}
void loop() {
  distance = getdistance();
  Serial.println(distance);
  delay(10);
}