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

// Set I2C address of LCD
#define LCD_ADDRESS 0x27

// Create LCD object
LiquidCrystal_I2C lcd(LCD_ADDRESS, 16, 2);

void setup() {
  // Initialize I2C
  Wire.begin(21, 22);

  // Initialize LCD
  lcd.init();
  lcd.backlight();
}

void loop() {
  // Print "Hello World" on LCD
  lcd.setCursor(0, 0);
  lcd.print("Hello World");

  // Wait 1 second
  delay(1000);
}