#include <Wire.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C mylcd(0x27, 16 ,2);

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

void loop() {
    // mylcd.clear();
    mylcd.setCursor(0, 0);
    mylcd.print("hello world");
    mylcd.setCursor(0, 1);
    mylcd.print("hello Arduino");
}