#include <LiquidCrystal.h>
const int rs = 13, en = 12, d4 = 7, d5 = 6, d6 = 5, d7 = 4;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

unsigned long waktuMulai, waktuIni;
const int detik = 1000, menit = 60, jam = 60;
int sec = 0, mint = 0, hour = 0;


void setup() {
  lcd.begin(16, 2);
  lcd.setCursor(5, 0);
  lcd.print("clock");

}

void loop() {
  waktuIni = millis();

  if (waktuIni - waktuMulai >= detik) {
    waktuMulai = waktuIni;
    sec++;

    if (sec >= menit) {
      sec = 0;
      mint++;

      if (mint >= jam) {
      mint = 0;
      hour++;

      if (hour >= 24) {
        hour = 0;
      }
      }
    
    }
  }
  lcd.setCursor(4, 1);
  if (hour < 10) lcd.print("0");
  lcd.print(hour);
  lcd.print(":");
  if (mint < 10) lcd.print("0");
  lcd.print(mint);
  lcd.print(":");
  if (sec < 10) lcd.print("0");
  lcd.print(sec);
  
  
}