// Define the pins to be used
const int trigPin = 2; // Output pin of the ultrasonic sensor
const int echoPin = 3; // Input pin of the ultrasonic sensor

// Define variables to store the times
long duration;
int distance;

void setup() {
  // Initialize the pins as input or output
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);

  // Initialize serial communication
  Serial.begin(9600);
}

void loop() {
  // Send a 10-microsecond pulse to the output pin
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  // Measure the time it takes for the echo to arrive
  duration = pulseIn(echoPin, HIGH);

  // Calculate the distance in centimeters
  distance = duration * 0.034 / 2;

  // Print the distance to the serial console
  Serial.print("Distance: ");
  Serial.print(distance);
  Serial.println(" cm");

  // Wait a moment before repeating
  delay(1000);
}