#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);

int columna = 0;
int fila = 0;

void setup() {
  lcd.init();
  lcd.backlight();
}

void loop() {  
  lcd.setCursor(columna, fila);
  lcd.println("Hola Mundo");
  columna++;
  delay(500);
  if (columna == 15) {
    columna = 0;
    fila++;
    if (fila > 1) {
      fila = 0;
    }
  }
  lcd.clear();  
}