Head to the [ themes section of the addons site ](http://addons.silverstripe.org/add-ons?search=&type=theme) to check out the range of themes the
community has built. Each theme has a page with links you can use to preview and download it. Themes are normally published and downloaded using Composer,
*Note:* `[version]` should be replaced with a version constraint if you know it, otherwise leave it blank to pull the latest version compatible with your project.
A `theme` within SilverStripe is simply a collection of templates and other front end assets such as javascript and CSS located within the `themes` directory.
SilverStripe 4 has support for cascading themes, which will allow users to define multiple themes for a project. This means you can have a template defined in any theme, and have it continue to look back through the list of themes until a match it found.
To define extra themes simply add extra entries to the `SilverStripe\View\SSViewer.themes` configuration array. You will probably always want to ensure that you include `'$default'` in your list of themes to ensure that the base templates are used when required.
* A theme does not include any PHP files. Only CSS, HTML, images and javascript.
* Your theme contains a `composer.json` file specifying the theme name, author and license, and that it has `"type": "silverstripe-theme"`.
Once you've created your module and set up your Composer configuration, create a new repository and push your theme to a Git host such as [GitHub.com](https://github.com).
The final step is to [submit your theme to Packagist](https://packagist.org/about#how-to-submit-packages) (the central Composer package repository). Once your theme is listed in Packagist, and has `"type": "silverstripe-theme"` in its configuration, it will automatically be pulled into our addons listing site.
