download zip file (or fork)
clone, since this is just a bootstrap and must be developed.
set its name in
mysite/_config/config.yml (replace 'simple' with 'your-name').
flush=1 your site and your empty theme is switched on.
in theme folder run once
npm install or
sudo npm install then
This adds watcher for .SS, js, scss, css, images files, that will compile scss (if needed) and reload page.