#include <LiquidCrystal_I2C.h>

int lcdColumns = 16;
int lcdRow = 2;

LiquidCrystal_I2C lcd(0x27, lcdColumns, lcdRow);

void setup() {

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

void loop() {
  lcd.setCursor(0,0);
  lcd.print("hello world");
  delay(1000);
  //lcd.clear();
  lcd.setCursor(0,1);
  lcd.print("what time is it");
  delay(1000);
  lcd.clear();
}