#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);
int hours = 17;
int minutes = 15;
int a = 0;

int alarm_hours = 20;
int alarm_minutes = 30;

const int BUTTON_1 = 23;
const int BUTTON_2 = 25;
const int BUTTON_3 = 27;
const int BUTTON_4 = 29;

const int CLOCK_STATE = 0;
const int CONFIG_STATE = 1;
const int ALARM_STATE = 2;

int state = CLOCK_STATE;

void setup() 
{
  pinMode(2, OUTPUT);
  pinMode(3, OUTPUT);
  pinMode(BUTTON_1, INPUT_PULLUP);
  pinMode(BUTTON_2, INPUT_PULLUP);
  pinMode(BUTTON_3, INPUT_PULLUP);
  pinMode(BUTTON_4, INPUT_PULLUP);

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

}

void loop() 
{
  lcd.clear();
  if (state == CLOCK_STATE)
  {
    lcd.setCursor(0,0);
    lcd.print(hours);
    lcd.setCursor(2,0);
    lcd.print(":");
    lcd.setCursor(3,0);
    lcd.print(minutes);
    lcd.setCursor(0,1);
    lcd.print("by Yaroslav");
    delay(1000);
  }
}