#include <LiquidCrystal_I2C.h>
#include <Wire.h>
LiquidCrystal_I2C lcd(0x27,16,2);
int i;

void setup() {
  // put your setup code here, to run once:

lcd.begin(16,2);
lcd.init();
lcd.backlight();

}

void loop() {
  // put your main code here, to run repeatedly:
for (i=0;i<=11;i=i+1){
lcd.setCursor (i,0);
lcd.print("HELLO");
delay(100);
lcd.clear();
delay(100);
}
for (i=11;i>=0;i=i-1){
lcd.setCursor (i,0);
lcd.print("HELLO");
delay(100);
lcd.clear();
delay(100);
}

}