Thanks to shiura for this awesome project!
This is the Hollow Clock 4 by shiura, but implemented with an ESP8266 D1 which can get the real time from an NTP server.
The CAD files and the original version can be found here: https://www.instructables.com/Hollow-Clock-4/
Just follow the instructions on Instructables
To install use The Arduino IDE after that The ESP8266 Starts a Wifi Called HollowClock4 where you can Configure everything if the Website of the Clock Dosent Open Automaticly Please Visit 10.10.10.1 in your browser