Still there? Well done! But hold on, here begins the serious part... In order to control your creation, you're going to plug its brain: JavaScript.
[`Link a JS script`](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/script) to your `bring-it-to-life.html` file.
In this script, you're going to close the left eye of your entity.
To do so, you have to target the `eye-left` HTML element by its `id` thanks to the [`getElementById`](https://developer.mozilla.org/en-US/docs/Web/API/Document/getElementById) method. Then, change the `style` of your `eye-left` to set its background color to black. We also need to modify its shape ; for that we are going to add a new class to it.
In the JS file, add the freshly-created class `eye-closed` to the [`classList`](https://css-tricks.com/snippets/javascript/the-classlist-api/) of your `eye-left` element, and [set its style property](https://developer.mozilla.org/en-US/docs/Web/API/ElementCSSInlineStyle/style#setting_styles) background color to "black".