"Based on the basic_polybar theme"
Place the basic_folder in the ~/.config/leftwm/themes, the nord.rasi is the nord theme for rofi and it goes into ~/.config/rofi .
The config.toml is the file with the leftwm keybindings, in ine 6 there is the keybind for rofi launcher with nord theme and papirus icons, line 12 there is the rofi window with same themeing of the applauncher.