int trigPin = 3; // sends out signal
int echoPin = 2; // Receives signals




void setup() {
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  Serial.begin(9600);

}

void loop() {
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  // READ THE RESULTS
  int duration = pulseIn(echoPin, HIGH); // measuring the time it takes
                                         // for the signal to return
  Serial.print(" Distance in cm: ");
  Serial.println(duration/58); // converts to cm
  Serial.print("Distance in inches: ");
  Serial.print(duration/148); // converts to inches

  if (duration / 50 < 100)
  {
    Serial.println(" You are too close "); // if closer then 100cm
  }

  else if ((duration / 50 > 100) & (duration / 58 < 400))
  {
    Serial.println(" you are in range "); // if in between 100-400cm than is prints ot you are in range
  }

  else if (duration / 50 > 400)
  {
    Serial.println(" you are too far "); // if farther then 400cm
  }  

  delay(1000);

}