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

#define I2C_ADDR 0x27
#define TOTAL_ROWS 2
#define TOTAL_COLUMNS 16

LiquidCrystal_I2C lcd(I2C_ADDR, TOTAL_COLUMNS, TOTAL_ROWS);

void setup() {
  lcd.init();                      // Initialize the LCD
  lcd.backlight();                 // Turn on the backlight
}

void loop() {
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("HELLO  ");
  delay(1000);

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Lets Count 0-20!");
  delay(1000);

  lcd.clear();
  for (int i = 0; i <= 20; i++) {
    lcd.setCursor(0, 1);
    lcd.print(i);
    delay(500);
    lcd.clear();
  }
}