I once conceived somewhere in my system to shelter a 
binary clock in order to broaden my horizons. 
Ready options did not suit me, I wanted something customizable.
Here's what I needed: the Chrome extension “ 
Create Your Own ” and a ready-made js script found on 
Stackoverflow .
You can get 
this watch:

or with other pictures:
')

or 
no pictures at all:

What is "Create Your Own"
The “Create Your Own” extension allows anyone who has mastered html, css and js to create a simple application for Chrome. For example, at first I used it to store a picture of the layout of Birman there:

In the extension settings, everything is quite transparent - 3 tabs are responsible for editing html, css and javascript (which must be left in the tags