Layouts and Pictures

I need a little help, , ,

Today I tried making my own layout for the first time, it's starting to look great, but I am having a problem with the pictures I put onto it. I've put an image for my header and I put a gif for my profile picture, but it doesn't show on my side?

Here's how it's supposed to look like (I used https://nein-mc.neocities.org/csstest/ as a preview):

and here's how it looks when I put the code into my spacehey:

I also have a loading screen that I put as well, , , that also doesn't show when I open my profile.

If anyone could help with this, I'd really apprieciate it!