#include <LiquidCrystal.h>
 const int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
 LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
 void setup(){
  lcd.begin(16, 2);
  lcd.print("hello world!");
 }
 void loop(){
  lcd.setCursor(0,1);
  lcd.print(millis() / 1000);
 }