#include <LiquidCrystal.h>
int rw = 8, en = 9, d4 = 4, d5 = 5, d6 = 6, d7 = 7; 
LiquidCrystal lcd(rw, en, d4, d5, d6, d7); 

void setup() {
  // put your setup code here, to run once:
  lcd.begin(16, 2); //(column, row) 
  lcd.print("hello world!"); 
}

void loop() {
  // put your main code here, to run repeatedly:
  lcd.setCursor(15,1); 
  lcd.print(millis() / 1000); 

}