Here's my button! I think it fits this website pretty well, and it just leads to the homepage. Go on. Steal its code. I don't care if you hotlink it (unless that's against Neocities' TOS, then I do care).
The code for it is as follows:
<p><a href="https://nitrossite.neocities.org"><img src="https://nitrossite.neocities.org/staticbutton.png" alt="nitrossite.neocities.org"></a></p>