#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include "RTClib.h"
RTC_DS1307 rtc;
LiquidCrystal_I2C lcd(0x27, 16, 2);
char daysOfTheWeek[7][12] = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};

const int b = 13;
int bs = 0;

void setup () 
{
  pinMode(7, OUTPUT);
  Serial.begin(9600);
  lcd.begin (16,2);  // initialize the lcd 
  if (! rtc.begin()) 
  {
    lcd.print("Couldn't find RTC");
    while (1);
  }
  if (! rtc.isrunning()) 
  {
    lcd.print("RTC is NOT running!");
  }
    //rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));//auto update from computer time
    rtc.adjust(DateTime(2022, 11, 21, 0, 0, 0));// to set the time manually 
}

void loop () 
{
bs = digitalRead(b);
if (bs == HIGH)
  {
    lcd.backlight();//To Power ON the back light
    digitalWrite(7,HIGH);
    DateTime now = rtc.now();
    lcd.setCursor(1, 0);
    lcd.print("LED ON SELAMA");
    lcd.setCursor(5, 1);
    lcd.print(now.hour());
    lcd.print(':');
    lcd.print(now.minute());
    lcd.print(':');
    lcd.print(now.second());
    lcd.print("  ");
    Serial.println("LED ON SELAMA");
    Serial.println(now.second(),DEC);
  }
else
  {
    lcd.noBacklight();
    lcd.clear();
    digitalWrite(7,LOW);
    rtc.adjust(DateTime(0, 0, 0, 0, 0, 0));
  }
}