#include <LiquidCrystal_I2C.h>
#include <RTClib.h>
RTC_DS1307 rtc;
LiquidCrystal_I2C lcd(0x27, 20, 4);

void setup() {
  // put your setup code here, to run once:
  rtc.begin();
  lcd.init();
  lcd.backlight();
  Serial.begin(9600);
  lcd.begin(20,4);
  lcd.setCursor(0,1);
  lcd.print("Real Time Clock(RTC)");
  delay(2000);
  lcd.clear();
}

void loop() {
  // put your main code here, to run repeatedly:
  DateTime now = rtc.now();
  lcd.setCursor(3,1);
  lcd.print("TIME: ");
  lcd.print(now.hour());
  lcd.print(":");
  lcd.print(now.minute());
  lcd.print(":");
  lcd.print(now.second());
  delay(1000);
  lcd.clear();
}