chosen_theme?

[InvisibleRasta]

what does this mean ? in theme.lua, so that you just need to change chosen_theme variable in rc.lua.
i see
local chosen_theme = themes[5]
and
beautiful.init(string.format("%s/.config/awesome/themes/%s/theme.lua", os.getenv("HOME"), chosen_theme))

which one to change?

[Luca CPZ]

You just have to change this line. More precisely, you have to change only the array index to the number corresponding to the theme you want. The numbers are listed here in the comments. For instance:

local chosen_theme = theme[1] -- for blackburn