#define trigpin 2
#define echopin 3
long duration;
int distance;
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);
  duration=pulseIn(echopin,HIGH);
  distance=(duration * 0.034/2);
  Serial.print("Distance:");
  Serial.print(distance);
  Serial.println("cm");
  delay(1000);
}