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

int i;
int j;
void setup() {
lcd.init();
lcd.backlight();
lcd.begin(16,2);
}

void loop() {
for (i=0; i<5; i++){
  lcd.setCursor(0,0);
  lcd.print("Hello World!");
  delay(2000);
  lcd.clear();
  delay(100);
  lcd.setCursor(0,1);
  lcd.print("Hello World!");
  delay(2000);
  lcd.clear();
  delay(100);
 }
 lcd.clear();
 delay(10);
 for(j=0; j<5; j++){
   lcd.setCursor(0,0);
   lcd.print("DONE");
   delay(2000);
 }
}