The Stark theme is provided for demonstration purposes: it uses Drupal's default HTML markup, and provides just enough CSS to arrange the page in a traditional "Header, sidebars, content, and footer" style. Designers wishing to use Stark as a starting point for their own Drupal theme can copy this directory to the sites/all/themes folder, renaming the .info to match their new theme's name. See http://drupal.org/node/176043 for more information on where to place your custom themes to ensure easy maintenance and upgrades.