const int TRIG_PIN = 2;
const int ECHO_PIN = 4;
long duration, distance;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
}

void loop() {
  distance = getDistanceInCentimeters();
  Serial.println("Distance = "+ String(distance));
  delay(1000); // this speeds up the simulation
}
  long getDistanceInCentimeters(){
  digitalWrite(TRIG_PIN,LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN,LOW);
  duration = pulseIn(ECHO_PIN, HIGH);
  return (duration *0.034/2) +1;
}