Adding custom setting

[mayeaux]

I'd like to add a custom option to the settings that will set a variable value

For the sake of the argument, let's say it's theme, with the options: light, dark and blue

It will open up the regular settings options with Theme listed and 'Light' as the default value

When the options are opened it shows
Light
Dark
Blue

with the back button.

Then when one of the buttons are clicked, there is an event where I set the variable value, let's say themeValue='dark'

I thought this would be simple to do but can't find any documentation or working examples. Is this possible/documented anywhere? Thanks

[MmdRexa]

did you find any solution for that?