Add a LDR sensor with 10k resistor by making a resistor divider network on A0 pin, this will change the brightness accordingly. High brightness in day time, low in night. The code will also work without these sensors if you don't want adjustable brightness, it will locked on default settings.

Video: Steps involved in making this clock.

7- Segment Clock:

Now, we have 4 panels and one dash. Connect 2 panels in series in pair.

Now connect dash in between and connect NodeMCU using schematics given below:

Code:

1) First initialize the code using libraries

#include <ESP8266WiFi.h>
#include <Adafruit_NeoPixel.h>
#include <WiFiUdp.h>
#include <NTPClient.h>
#include <TimeLib.h>
#include <DHT.h>
#include <Adafruit_Sensor.h>

 2) Define all pixels, I/O pins, sensor pins:

#define PIXEL_PER_SEGMENT 2 // Number of LEDs in each Segment
#define PIXEL_DIGITS 4 // Number of connected Digits
#define PIXEL_PIN 2 // GPIO Pin
#define PIXEL_DASH 1 // Binary segment
#define LDR_PIN A0 // LDR pin
#define DHT_PIN 13 // DHT Sensor pin
#define BUTTON_PIN 12 // Button pin

3) For time format connect Internet using Wi-Fi to ESP8266 

WiFi.begin(ssid, password);
Serial.print("Connecting.");
while ( WiFi.status() != WL_CONNECTED )

4) Time settings on Pixel 

void disp_Time() {
clearDisplay();
writeDigit(0, Hour / 10);
writeDigit(1, Hour % 10);
writeDigit(2, Minute / 10);
writeDigit(3, Minute % 10);
writeDigit(4, Second / 10);
writeDigit(5, Second % 10);
disp_Dash();

 5) Color setting on panels:

if (index == 0 || index == 1 ) color = strip.Color(0, Brightness, 0);
if (index == 2 || index == 3 ) color = strip.Color(0, Brightness, 0);
if (index == 4 || index == 5 ) color = strip.Color(Brightness, 0, 0);

This is a brief about code, also the code...