#include <LiquidCrystal.h>
LiquidCrystal lcd(12,11,5,4,3,2);
const int trigPin=9;
const int echoPin=10;
void setup()
{
  lcd.begin(16,2);
  pinMode(trigPin,OUTPUT);
  pinMode(echoPin,INPUT);
  lcd.print("Distance:");
}
void loop()
{
  long duration;
  float distance;
  digitalWrite(trigPin,LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin,HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin,LOW);
  duration=pulseIn(echoPin,HIGH);
  distance=duration*0.034/2;
  lcd.setCursor(0,1);
  lcd.print("                ");
  lcd.setCursor(0,1);
  lcd.print(distance);
  lcd.print("cm");
  delay(500);
}