Build your Drupal theme from scratch with the right tools !
Basement is not a base theme. Basement is a tool to help you build your theme from scratch.
Of course, you can download basement and rename every file and function, but who have time for this? Hopefully, there's a drush command for that!
First, you need to have basement theme enabled on your site:
drush dl basement
drush en -y basement
Then you can execute the basement-construct (or bc) command to create your
shinny new theme
drush basement-construct "My theme name" --machine-name=mythemename
Theme name
--machine-name=mythemename
--destination=sites/all/themes/custom
See drush basement-construct --help for more informations.