#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd (0x27, 16, 2);
int trigpin = 12;
int echopin= 14;
float duration, distance;
void setup() {
 pinMode(trigpin, OUTPUT);
 pinMode(echopin, INPUT);

  lcd.init();
  lcd.backlight(); 
}

void loop() {
  digitalWrite(trigpin, HIGH);
  digitalWrite(trigpin, LOW);

  duration = pulseIn(echopin, HIGH);

  distance= 0.017*duration;

  Serial.println(distance);
  delay(1000);

  lcd.setCursor(0,0);
  lcd.print("Distance : ");
  lcd.print(distance);
  lcd.setCursor(0,1);
  lcd.print("Hello world!")
  delay(1000);
}