Tools that needs to be install Sass.
sudo apt-get install ruby1.9.1 Sass is written in Ruby, so you’ll need Ruby installed as well
sudo gem install sass Sass is an extension of CSS3, adding nested rules, variables, mixins, selector inheritance, and more. For more informantion check this http://sass-lang.com/
sudo gem install compass Compass is an open-source CSS Authoring Framework. For more informantion check this http://compass-style.org/