How to put div on the background & under another divs?

I seriously need your help. I have problem with my HTML code and I don't know what to do, I tried everything and it still doesn't work the way I want it to work. The problem is, I want those two blue rectangles (which are coded as div style="background") to be in those exact positions, but to... show more I seriously need your help. I have problem with my HTML code and I don't know what to do, I tried everything and it still doesn't work the way I want it to work.

The problem is, I want those two blue rectangles (which are coded as div style="background") to be in those exact positions, but to don't go over anything else but background (the red image):
https://s8.postimg.cc/3z8n6suit/pic3_1.png
______________________
The faded window actually rolls up, like this: https://s8.postimg.cc/lqk9l626r/likethis.png
______________________
Here's the code, it is very long (rectangles are at the end): https://pastebin.com/4MJ50KNy
______________________
This is how I coded the rectangles:

<div style="background:url(&quot;https://s8.p...

<div style="background:url(&quot;https://s8.p...


In Google Chrome the code is showing as I want it to be, rectangles don't go over other windows, they're just on the background, but in other browsers it is messed up.

I would really appreciate any kind of help guys, I'm totally desperate :c
1 answer 1