Here is one approach:

https://pank.eu/blog/pretty-babel-src-blocks.html

I feel like I have seen some work that used ruby and python icons as
displays over #+begin_src, but I can't find it now.

John

-----------------------------------
Professor John Kitchin
Doherty Hall A207F
Department of Chemical Engineering
Carnegie Mellon University
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412-268-7803
@johnkitchin
http://kitchingroup.cheme.cmu.edu



On Tue, Jun 2, 2020 at 2:54 PM William Denton <wtd@pobox.com> wrote:

> Is anyone doing any fancy formatting of source blocks, such as putting a
> line
> in the left fringe, or a box around them, or having some interesting
> background?
>
> I ask because I recently changed the theme I use to get the dark Solarized
> look
> I like,[1] and all of a sudden my #+begin_src lines were underlined and
> #+end_src had a line above it.  These come from org-block-begin-line and
> org-block-end-line, and are shown here, but I'd never noticed them in
> documentation or had them on my screen before:
>
>
> https://orgmode.org/worg/org-contrib/babel/examples/fontify-src-code-blocks.html
>
> Aside from fontifying the source blocks I've never done anything special
> about
> them (except wonder how I ever did anything without them), but seeing this
> made
> me wonder if anyone here has really customized them so they look like
> medieval
> manuscripts or something from a futuristic video game.  (If any of that is
> possible---but in Emacs, anything is possible ...)
>
> Bill
>
> [1] Now I'm using https://github.com/bbatsov/solarized-emacs, with
> variable
> pitch turned off and Org headline resizing turned off.
>
> --
> William Denton :: Toronto, Canada   ---   Listening to Art:
> https://listeningtoart.org/
> https://www.miskatonic.org/         ---   GHG.EARTH: https://ghg.earth/
> Caveat lector.                      ---   STAPLR: https://staplr.org/
>
>