#include <LiquidCrystal.h>

const int rs = 2,
          en = 3,
          d4 = 6,
          d5 = 7,
          d6 = 8,
          d7 = 9;

LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

void setup() {
  Serial.begin(9600);
  lcd.begin(16, 2);
}

void loop() {
  lcd.setCursor(0, 0);
  lcd.print("Hello, world!");
  delay(2000);
  lcd.setCursor(0, 1);
  lcd.print("Ha, Got you!!");
  delay(2000);
  lcd.clear();
  delay(2000);
}