const int trigPin = 7;
const int echoPin = 6;

void setup() {
  Serial.begin(9600);           // Start Serial Monitor
  pinMode(trigPin, OUTPUT);     // Set Trig as output
  pinMode(echoPin, INPUT);      // Set Echo as input
}

void loop() {
  // Send a 10µs pulse to trigger the sensor
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  // Read the echo time
  long duration = pulseIn(echoPin, HIGH);

  // Calculate distance in cm
  float distance = (duration / 2.0) * 0.0343;

  // Display the result
  Serial.print("Distance: ");
  Serial.print(distance);
  Serial.println(" cm");

  delay(500); // Wait half a second before next reading
}