awesome-wm-nice VS dots

for a few days now I've been trying to get Nice to work on awesome as it's supposed to. Whenever I get to this instruction and change my rc.lua file it just makes the titlebars empty and transparent.

As far as I know, double borders can be achieved with four title bars, one for each side. This is how it is done in the nice module (the screenshot above). This post and this GitHub issue also mention this solution.

Now I know this is possible in AwesomeWM (https://github.com/mut-ex/awesome-wm-nice), but I want to use KDE. Thank you in advance.

It's been a while since I switched over to nice for handling title bars, but iirc, the title bars are just widgets. Each side is a wibox, which supports everything wibox does. In that sense, you can simply set a height property if I'm not mistaken.

Here is a project with advanced use of titlebar. If I get it, you want to do something similar, so you can take a look at it, I guess https://github.com/mut-ex/awesome-wm-nice

I am a newbie with practically no knowledge of lua. I wanted the titlebar to have the three red, yellow and green dots for buttons. Instead of using icons, I wanted to use gears.shape and I saw https://github.com/joepigott/dots/tree/main and copied his code for the titlebar and the shape setting in theme.lua but mine doesn't show any icons or even the default image icons and I can't understand what is wrong. Please help me. It stays like this: