A block component is a `<div>` with `display: block`, and a starting point for building your own custom block components.

### Example

```jsx live=true
<Block
	as="h1"
	extend={{
		fontSize: 24,
		padding: 20,
		margin: 0,
		color: "white",
		textShadow: "1px 1px 1px green",
		fontFamily: "Helvetica Neue, Arial",
		background: "darkseagreen"
	}}
>
	Hello World
</Block>
```