***

title: Start the development environment
order: 50
---------

You will have a new folder that has the name you picked for your pattern.
If you chose `test`, you will have a `test` folder. If you chose `banana`, you'll have a `banana` folder.

If you enter that folder, you'll find a couple of subfolders:

*   `config` holds your pattern's configuration file
*   `src` holds your pattern's source code
*   `example` holds the development environment

To start the development environment, enter the `example` folder and run: `npm run start` (or `yarn start` if you're using Yarn as a package manager.

The development environment will watch for any changes you make to
the pattern's source code. When you do, it will update automatically in your browser.

<Note>

##### Yay, you're done!

All you have to do now, is design your pattern.
Thankfully, we have a tutorial for that too:

*   [Pattern design tutorial](/tutorials/pattern-design/): A step-by-step guide to designing your first pattern

</Note>