#include "RTClib.h"
RTC_DS3231 rtc;
#include <Adafruit_NeoPixel.h>
#ifdef AVR
 #include <avr/power.h> 
#endif
#define PIN        13 
unsigned long previousMillis = 0; 
const unsigned long interval = 60000;
int r;
int g;
int b;
int i;
bool flag = 0;
#define NUMPIXELS 8 
Adafruit_NeoPixel pixels(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);
#define DELAYVAL 500 
char daysOfTheWeek[7][12] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};
void setup () {       
#if defined(AVR_ATtiny85) && (F_CPU == 16000000)
  clock_prescale_set(clock_div_1);
#endif 
  pixels.begin(); 
  Serial.begin(57600);
#ifndef ESP8266
  while (!Serial);
#endif 
  if (! rtc.begin()) {
    Serial.println("Couldn't find RTC");
    Serial.flush();
    while (1) delay(10);
  }
  if (rtc.lostPower()) {
    Serial.println("RTC lost power, let's set the time!");
    rtc.adjust(DateTime(F(DATE), F(TIME)));
   
  }
   rtc.adjust(DateTime(F(DATE), F(TIME))); 
}
void loop () {
    DateTime now = rtc.now();
    Serial.print(now.year(), DEC);
    Serial.print('/');
    Serial.print(now.month(), DEC);
    Serial.print('/');
    Serial.print(now.day(), DEC);
    Serial.print(" (");
    Serial.print(daysOfTheWeek[now.dayOfTheWeek()]);
    Serial.print(") ");
    Serial.print(now.hour(), DEC);
    Serial.print(':');
    Serial.print(now.minute(), DEC);
    Serial.print(':');
    Serial.print(now.second(), DEC);
    Serial.println();
     if(now.hour() == 2 and flag != 1)
    {
      flag = 1;
    }
      if(now.hour() >= 4 and flag == 1)
    {
      flag = 0;
    }  
     unsigned long currentMillis = millis(); 
 
  if (currentMillis - previousMillis >= interval) {
    previousMillis = currentMillis; 
    
    if(now.hour() == 2 and flag != 1)
    {
      flag = 1;
    }
    if(now.hour() >= 4 and flag == 1)
    {
      flag = 0;
    }
    if(now.hour() >= 20 and flag != 1)
     {
      r = 1;
      g = 1;
      b = 1;
     }
  
    if(now.hour() >= 20 or now.hour() <= 2 and flag != 1)
     {
      r = 0;
      g = 0;
      b = 0;
     }else if( now.hour() <= 9 and now.hour() >= 2)
     {
      if(now.minute() % 3 == 0)
      {
      r += 2;
      g++;
      b = 50;
      }
     }else if( now.hour() <= 12 and now.hour() >= 9)
     {
      if (r != b){ r -= 2;}
      if (g != b){ g--;}
      if(now.minute() % 2 == 0)
      {
      b = 50;
      }
     }else if( now.hour() <= 19 and now.hour() >= 12)
     {
     r=g=b=50;
     }else if( now.hour() <= 20 and now.hour() >= 19)
      {
      if (b >= r){ b -= 2;}
      if(now.minute() % 1 == 0)
      {
      r += 2;
      g++;
      }
      }
  }
 
  for(int i=0; i<NUMPIXELS; i++) { 
    
    pixels.setPixelColor(i, pixels.Color(r, g, b));
    pixels.show();  
    delay(1); 
}
}