const int trig=12;
const int echo=14;
long duration;
int distance;
void setup() {
  pinMode(trig, OUTPUT);
  pinMode(echo, INPUT);
  Serial.begin(9600);
}

void loop() {
  digitalWrite(trig,LOW);
  delayMicroseconds(2);
  digitalWrite(trig, HIGH);
  delayMicroseconds(10);
  digitalWrite(trig, LOW);
  duration=pulseIn(echo, HIGH);
  distance=duration*0.034/2;
  Serial.print("DISTANCE: ");
  Serial.println(distance);
  delay(500);
}