MR.W HELLO, GUYS I'M HERE INTRODUCE MY SELF AND MY NAME IS FAREL, JUST CALL ME MR.W SO HERE I WILL TEACH YOU HOW TO INSTALL SASS QUICKLY TO USE FOR YOUR CSS PREPROCESSOR. IT'S NOT DIFFICULT BUT IF THIS WAY STILL NOT WORKS FOR YOU, INSTEAD YOU COULD RESTART UR COMPUTER, OR TRY AGAIN THIS WAY SO OK LET'S GO AHEAD. 1. INSTALLING RUBY go to this same website, and install ruby on the current version. here we use sass through ruby, and done all installation process 2. CHECKING RUBY INSTALLED after installed click " windows + r " and after that you write, the command " ruby -v ", it means to check does your ruby installed. 3. WHEN RUBY INSTALLED if the ruby already installed also after you command and entered, it will appear a proof that your ruby is installed 4. INSTALLING SASS Write that command to install sasss " gem install sass ". enter and it will start to done every process ...