This step assumes that you already have NodeJS and NPM installed. If not, go to NodeJS website and download the latest LTS build. Once done, follow the below commands :
git clone https://github.com/ECell-SLRTCE/ecell-website.git
cd ecell-website
npm install
npm run watch:sass
-sass
  -abstracts
    - _functions.scss       
    - _mixins.scss
    - _variables.scss
  -base
    - _animations.scss
    - _base.scss
    - _typography.scss
    - _utilities.scss
  -components
    All components go here
  -layout
    - _header.scss
    - _footer.scss
    - _navigation.scss
  -pages
    - _home.scss
  main.scss