#define echoPin A2
#define trigPin A1
long duration , distance ;

void setup() {
  // put your setup code here, to run once:
  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/58.2;
  Serial.println(distance);
  // put your main code here, to run repeatedly:
  delay(50); // this speeds up the simulation
}