how do i put my flower crown behind my loading screen

im using both the code from this miku loading screen (the only alteration is the image url to a picmix i made of my rapunzel edit) and an altered version of the santa hat code from this years advent calendar

this is the altered santa code itself

i want to try to put it behind the loading screen but ive had a couple issues:
when the code itself was still above the miku code changing the position from absolute to anything else would make my pfp disappear and have the crown somewhere in the space its supposed to be in
after i placed it under the miku code doing that instead makes the flower crown fail to show up at all
i also tried fixing it by animating it to only appear after the loading screen leaves but because i misunderstood how animation code works i accidentally made the loading screen unable to disappear
(i got it to disappear later but then so did everything else except my profile background so i had to remove all parts of the miku code temporarily and readd it to return things to how they were before)

this is what the original problem looks like if you dont feel like going to another page just to see whats happening (fair enough)