That was made using shields.io
Heres the full text
[](/c/pix[email protected])
(change the &
to an ampersand, lemmy removes the actual symbol and replaces it with that when you try to type it)
A minimal version is 
is for adding a link when you click it and the things after the question mark is to change various things about how it looks. You can swap it to any community by changing the community and the instance in the link

https://kbin.social/m/[email protected] (Most posts are not synced yet.)
There’s also https://kbin.social/m/[email protected] on lemmy.ml
kbin has their own https://kbin.social/m/pixelart
More-generally, if you see something of this form:
community@instance.name
Where the community above is:
pixelart@lemmyloves.art
You can just plonk that into the search field in kbin, and it’ll bring up a page where you can subscribe to it.
You can also link directly to the search – and doing so apparently also works on lemmy servers, since the URL format is the same:
[Search link](/search?q=pixelart%40lemmyloves.art)
Yields:
[email protected] and [email protected] look great! [email protected] and [email protected] too