If you mean the code that effects ScreenJesus from Neocities itself, I put it in the same file right below my other Javascript, which are inserted at the very bottom of each page right before the body tag closes. I'm not using it these days, though, but it's a neat trick.
![plæst[2]k avatar](/site_screenshots/17/59/plaest2k/index.html.50x50.webp)
If you mean the code that effects ScreenJesus from Neocities itself, I put it in the same file right below my other Javascript, which are inserted at the very bottom of each page right before the body tag closes. I'm not using it these days, though, but it's a neat trick.