This module controls background size and position for background images.

## Background Size

Use the `.bg-cover` or `.bg-contain` utilities to control background size.

```html
<div class="p4 bg-cover white bg-gray" style="background-image: url(https://d262ilb51hltx0.cloudfront.net/max/2000/1*DZwdGMaeu-rvTroJYui6Uw.jpeg)">
  <h1>.bg-cover</h1>
</div>
```

## Background Position

Use background position utilities to control position.

### .bg-center

```html
<div class="p4 bg-cover bg-center white bg-gray" style="background-image: url(https://d262ilb51hltx0.cloudfront.net/max/2000/1*DZwdGMaeu-rvTroJYui6Uw.jpeg)">
  <h1>.bg-center</h1>
</div>
```

### .bg-top

```html
<div class="p4 bg-cover bg-top white bg-gray" style="background-image: url(https://d262ilb51hltx0.cloudfront.net/max/2000/1*DZwdGMaeu-rvTroJYui6Uw.jpeg)">
  <h1>.bg-top</h1>
</div>
```

### .bg-right

```html
<div class="p4 bg-cover bg-right white bg-gray" style="background-image: url(https://d262ilb51hltx0.cloudfront.net/max/2000/1*DZwdGMaeu-rvTroJYui6Uw.jpeg)">
  <h1>.bg-right</h1>
</div>
```

### .bg-bottom

```html
<div class="p4 bg-cover bg-bottom white bg-gray" style="background-image: url(https://d262ilb51hltx0.cloudfront.net/max/2000/1*DZwdGMaeu-rvTroJYui6Uw.jpeg)">
  <h1>.bg-bottom</h1>
</div>
```

### .bg-left

```html
<div class="p4 bg-cover bg-left white bg-gray" style="background-image: url(https://d262ilb51hltx0.cloudfront.net/max/2000/1*DZwdGMaeu-rvTroJYui6Uw.jpeg)">
  <h1>.bg-left</h1>
</div>
```