#include <LiquidCrystal_I2C.h>

//#define I2C_ADDR    0x27
//#define LCD_COLUMNS 20
//#define LCD_LINES   4
//LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);

LiquidCrystal_I2C lcd(0x27, 16, 2);

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

void loop() {
 

 for (int col =0; col <=16; col++) {
    lcd.clear();
    lcd.setCursor(col, 0);
    lcd.print("Hello");
    delay(200);
 }
 
 for (int col =16; col >=0; col--) {
    lcd.clear();
    lcd.setCursor(col, 1);
    lcd.print("Hello");
    delay(200);
 }

}