This is a clock based on a ESP32-module and two 8x8 (or on 8x16) Neopixel-Matrix-Dsiplay
All you need is an ESP32-module (b.e. an ESP32-WROOM), tow modules 8x8 Neopixel-Matrix-Display and some wires.
The clock fetches the time from your WLAN, so include your WLAN-Routers name and your password. Will only work with 2,4GHz-WLANS.
You can change the Color of each digit and the color of the blinking second-bar at the beginning of the sourcetext.
You will need to install a library for the Diplay, Adafruit NeoMatrix in your Arduino IDE. You need to update your Arduino-IDE to be able to drive the ESP-Boards.