Download color-theme-random.el and put it in a folder where Emacs can find it, e.g. site-lisp. Add following lines to your .emacs initialization file:
(require 'color-theme-random) (color-theme-random)You can replace existing themes in my-fav-color-themes with those you prefer. You can also assign larger weight values to themes you like better, so that they can be picked more likely.