you have <code>@glimmer/component</code> and <code>@glimmer/tracking</code>
installed in your app.</li>
<li>Create a new component in your app, and experiment! <code>ember g component</code> will give you just a test and a template. Adding <code>-gc</code> to the command will generate the JavaScript class to go with it. Try adding a button with an action.
If you need to generate a classic component, you can still make one with <code>ember g component -cc</code></li>
<li>Try refactoring one existing componen