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

void setup() {
  
  Serial.begin(9600);

  
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
}

void loop() {
  
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  
  long duration = pulseIn(echoPin, HIGH);

  
  float distance = duration * 0.034 / 2;

  
  Serial.print("Distance: ");
  Serial.print(distance);
  Serial.println(" cm");


  delay(1000);
}