SASS triangle

sass-triangle.sass

=triangle($direction: right, $size: 10px, $color: #999)
  width: 0
  height: 0
  line-height: 0
  border: $size solid transparent
  @if $direction == top
    border-bottom-color: $color
  @else if $direction == right
    border-left-color: $color
  @else if $direction == bottom
    border-top-color: $color
  @else if $direction == left
    border-right-color: $color

.triangle
  +triangle(bottom, 30px, red)