I am trying to create a box like below picture.
This box will use for time and other two-digit numbers.

I putted my code here
I have some problems and questions:
- Boxes in picture seems have two-color borders. outside is a color (color=”#706f6f”) and inside like shadow . with what technique I can create this inside border? Is this CSS3 effect ?
- I think my code style classification is not good.would you please help me to make it better?
- I don’t know where should I put colons(:) between days hours mins and secs ?
- Last question is where is better to putt texts under boxes ? (DAYS , HOURS , MINS , SECS) Is it better to put them in separate Div container ?
See this demo fiddle.
The markup now shows like:
You could narrow it down to this:
Tweak it a bit further as you like.