int trig = 2;
int echo = 3;
int distance;
long time;

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

void loop() {
  digitalWrite(trig, LOW);
  delayMicroseconds(5);
  digitalWrite(trig, HIGH);
  delayMicroseconds(10);
  digitalWrite(trig,LOW);
  time = pulseIn(echo,HIGH);
  distance = (time/2)*0.034;
  Serial.println(distance);
  
}