#include "Ultrasonic.h"
int duration;
int distance;
void setup() {
  pinMode(7, OUTPUT);
  pinMode(8, INPUT);
  Serial.begin(9600);
}

void loop() {
  digitalWrite(7, HIGH);
  delayMicroseconds(1);
  digitalWrite(7, LOW);
  duration = pulseIn(8,HIGH);
  distance = map(duration,0,2000000,0,34300);
  Serial.println(distance);
}