To install a theme, click on its link and copy the resulting css. Then, click the Stylus extension icon and "Write style for: xykreilon.neocities.org". Paste and save. Give it a name that will remind you of it. You can add all the styles I and DigDeeper have written and switch between them at will from the Stylus menu.

Sand


Ice


Yotsuba B


Ghost


Simpleton


Above theme was made by Oreamnos - visit his site (gopher support required; use OverbiteFF extension in Pale Moon)