twitter/bootstrap — pull request #859 by scottkf (2011-12-27 21:50:43+00:00)
Title: 2.0 wip

So you can get borders that look like this:

[http://i.minus.com/jba9XPJWv82ysJ.png](http://i.minus.com/jba9XPJWv82ysJ.png)

By using the mixin this way:

```css
.arrow {
#borderArrow > .below(15px, 1px, @color, #f9f9f9);
}
```
You can use .below, .above, .left, .right and the parameters are: width of the arrows, border width, color of the border, color of the inside

Given this HTML:

```html

```