#include <RTClib.h>
RTC_DS1307 rtc;

#include <Adafruit_NeoPixel.h>
#define STARTPIXEL 0 // 0 = 12 o'clock is at the top
#define NUMPIXELS 60 //
#define PIXELPIN 8 // arduino PWM pin
Adafruit_NeoPixel strip = Adafruit_NeoPixel(NUMPIXELS, PIXELPIN, NEO_GRB + NEO_KHZ800);
byte pixelColorRed, pixelColorGreen, pixelColorBlue; // color values

#define DAYTIME 255
#define NIGHTTIME 127

int flag = 1;

void setup() {
  rtc.begin();

  // rtc.adjust(DateTime(__DATE__, __TIME__));  // RUN ONCE to set RTC to date/time sketch was compiled

  pinMode(PIXELPIN, OUTPUT);
  strip.begin();
  strip.clear(); // clear any set pixels
  strip.show(); // turn all pixels off
}

void loop() {
  DateTime now = rtc.now(); // get current dtg

  for (int i = 0; i < strip.numPixels(); i++) {
    if (i == now.second())
      pixelColorBlue = 255;
    else
      pixelColorBlue = 0;

    if (i == now.minute())
      pixelColorGreen = 255;
    else
      pixelColorGreen = 0;

    if (i == now.hour())
      pixelColorRed = 255;
    else
      pixelColorRed = 0;

    // place the pixel along the clock/strip and color it
    strip.setPixelColor((i + STARTPIXEL) % 60, strip.Color(pixelColorRed, pixelColorGreen, pixelColorBlue));
  }
  strip.show();
}