#include <LiquidCrystal.h>

LiquidCrystal lcd(12, 11, 10, 9, 8, 7);

int num = 0;

void setup() {
  lcd.begin(16, 2);
  lcd.println("Hello World!");
}

void loop() {
  lcd.setCursor(0, 1);
  lcd.print(num);
  num += 1;
  delay(500);
}