How to add background to this profile code?

marps You mean the clouds bg? If yes then I wanted it to be on whole screen ;w; like https://toyhou.se/Coywolfy has. On profile and folders.

marps CSS? :o Sorry, I dont know how coding works ;n; could you help me perhaps?

Aaand the user above forgot to mention, you can get the ability to use CSS when purchasing TH Premium ! it's really cheap and worth it tbh !

marps ohhh, now i finally get it!! Thank you so much!!!     

marps I hope you don't mind me asking but how does one code with css? I have premium but the F2U codes I have been using don't seem to work in css -- hhh I apologize for troubling you in advance! 

marps Ahhh Thank you so much! I realized I was plugging in the codes in the wrong area ^^; 

I appreciate you for responding! TwT

marps how did you end up getting the background image on there using html? i can’t seem to figure it out :(