Note
This challenge should be completable by people who took and finished Level 18 of Exercism's Front-end Fundamentals. Those who took Josh Comeau's CSS for JavaScript Developers should also be able to finish it.
- Find the expected result on derk-jan.com · challenge: the clock made of clocks and DO NOT INSPECT THE SOLUTION;
- Write down the list of requirements;
- Work on your implementation for as long as you want;
- After you are happy with your implementation, host it on your portfolio, a Codepen, a CodeSandbox, or GitHub Pages;
- Share your hosted solution including source code here as a comment.
Important
I did not come up with the idea but I saw a physical clock made out of clocks on Reddit years ago and recently saw a codepen by Stefan making me interested in recreating their result my own way.

I went a bit more CSS orientated with as little JavaScript as possible.
Screen.Recording.2025-10-18.at.00.55.01.mov
Codepen: https://codepen.io/paulvddool/pen/raxpLbV