Stuck editing the default theme

hey, i'm making my own theme using the default theme as basis.
to see what i'm doing: Reddit post
I'm stuck regarding changing interface components during a song.



What i want to do is:

1: Allign the songmeter stream bar with the display frame, while also removing the player color from the streambar
2: Horizontally flip the songmeterdisplay for player 2 & also remove the player color from the streambar
3: Allign the lifebar with the under & overlay


Where can i find the files/code to do so?

I have little knowledge on coding & lue,
but i'm still able to edit existing values/change positions.

EDIT:
Manages to change some things.... but the lifebars ends too early and i have no idea where to change it