// Include the necessary libraries
#include <NewPing.h>

// Define the pins for the sensor
#define TRIGGER_PIN  4
#define ECHO_PIN     3

// Define the maximum distance we want to sense (in centimeters)
#define MAX_DISTANCE 500

// Initialize the NewPing library with the sensor pins and maximum distance
NewPing sonar(TRIGGER_PIN, ECHO_PIN, MAX_DISTANCE);

void setup() {
  // Start serial communication
  Serial.begin(9600);
}

void loop() {
  // Send a ping and get the result (in centimeters)
  unsigned int distance = sonar.ping_cm();
  
  // Print the distance to the Serial Monitor
  Serial.println(distance);
  
  // Delay for a short amount of time before taking the next measurement
  delay(250);
}