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

LiquidCrystal_I2C lcd(0x27, 20,4);

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  lcd.init();
  lcd.backlight();
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("arduino");
  lcd.setCursor(0,1);
  lcd.print("class");

}

void loop() {
  // put your main code here, to run repeatedly:

}