const int trigPin = 9;
const int echoPin = 10;

long duration;
int distance;

void setup() {
  // Sets the trigPin as an Output
  pinMode(trigPin, OUTPUT);
  // Sets the echoPin as an Input
  pinMode(echoPin, INPUT);
  // Starts the serial communication
  Serial.begin(9600);
}

void loop() {
  // Clears the trigPin
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);

  // Sets the trigPin HIGH for 10 microseconds
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  // Reads the pulse width from the echoPin
  duration = pulseIn(echoPin, HIGH);

  // Calculates the distance in cm
  distance = duration * 0.0343 / 2; 

  // Prints the distance to the serial monitor
  Serial.print("Distance: ");
  Serial.print(distance);
  Serial.println(" cm");
}