Sources
The lovely image on the side on desktop with nyo!Poland & Lithuania is by 八年 on pixiv. On mobile, the image at the top with just nyo!Liet by herself is by sketchytea on Tumblr.
Most of the pixels were made by Nikumike, who used to have a site that since has been closed (their surviving pixels can be found here). Others were either made by @ pixeltalia on Tumblr or found here.
Also, this was my first time trying to code a site from scratch! The main site just used sadgrl's theme generator, but here I followed her tutorial and other sites like w3schools to figure everything out. It's pretty basic, but I like it!