#include <LiquidCrystal_I2C.h>
#include <time.h>

LiquidCrystal_I2C lcd(0x27, 16, 2); // I2C address 0x27, 16 column and 2 rows

byte hours=0;
byte lastHours;
byte minutes = 0;
byte lastMinutes;
byte seconds = 0;
byte lastSeconds;


void setup() {

lcd.init();
lcd.backlight();

}

void loop() {
  
if(lastHours != hours || lastMinutes != minutes || lastSeconds != seconds){

  if(lastHours != hours){
    hours = hour();
    lastHours = hours;
  }

  if(lastMinute != minute){
    minutes = minute();
    lastMinutes = minutes;
  }

  if(lastSeconds != seconds){
    seconds = second();
    lastSecond = seconds;
  }


  lcd.setCursor(0,0);
  lcd.print(hours);
  lcd.print(":");
  lcd.print(minutes);
  lcd.print(":");
  lcd.print(seconds);
}
}