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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

              $black        = #111
$blue         = blue
$yellow       = yellow
$white        = $white
$chomp-angle  = 45
$chomp-speed  = .35s
$track-height = 18px
$track-length = 350px
$track-speed  = 1.2s
$load-size    = 5 * $track-height

  * Funny enough, the actual element represents the moving track.
  * We use it's pseudo elements to create our head pieces.
  height     $track-height
  position   absolute
  top        50%
  left       50%
  width      $track-length
  margin-top -5px
  background repeating-linear-gradient(90deg, white, white 5%, transparent 5%, transparent 35%)
  animation  travel $track-speed infinite linear

    * Our pseudo elements create the head pieces
    * They are near identical minus subtle differences in animation and border
    * styling
    content ''
    position absolute
    left -($load-size / 2)
    top 50%
    border ($load-size / 2) solid $yellow
    border-radius 100%
    margin-top -($load-size / 2)
  * The top head piece
    border-left-color   transparent
    border-bottom-color transparent
    animation           chomp $chomp-speed infinite linear
    * The bottom head piece
    border-top-color   transparent
    border-right-color transparent
    animation          chomp-b $chomp-speed infinite linear

@keyframes travel
    background-position 0 0
    background-position -($track-length) 0

@keyframes chomp
    transform rotate($chomp-angle * -1deg)
    transform rotate(($chomp-angle * 2) * -1deg)
    transform rotate($chomp-angle * -1deg)

@keyframes chomp-b
    transform rotate($chomp-angle * -1deg)
    transform rotate(0deg)
    transform rotate($chomp-angle * -1deg)

  * Base styling
  box-sizing border-box
  animation  fadeIn .5s

  background-color $black
  text-align       center
  overflow         hidden
    content          ''
    border           15px solid $blue
    position         fixed
    top              0
    right            0
    bottom           0
    left             0

@keyframes fadeIn
    opacity 0
    opacity 1
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