That’s my css. I have tried huge px pictures but they seem to get smaller when I introduce them in the html so they get blurry. Thank you for helping!
I think you want this:
Since the image is actually small (it has “thumb” in the name), you are stretching it to fit the whole screen. But you want to use it as a repeating tile
And technically you can leave the last line off since “repeat” is the default.