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HTML

              
                #loading
  .outer-shadow
  .inner-shadow
  .timer
    .dot
      %span
    #left.hold
      .pie
    #right.hold
      .pie
              
            
!

CSS

              
                @import compass

// VALUE /////////////////

$bg: #dde6f0

// loading color -------------
$lc: #f50

$fix: 100%

// shadow ---------------------
$bs: 0 1px 0 rgba(0, 0, 0, .2)

// circle diameter ------------
$w: 100px

// highlight thickness --------
$low: 10px

// timer -----------------------
$tm: 8s

//  mixin- --------------------
=keyframes($name)
  @-webkit-keyframes #{$name}
    @content


// LOADING /////////////////

html
  background-color: $bg

#loading
  width: $w
  height: $w
  margin: 30px auto
  position: relative


.outer-shadow
  z-index: 6
  position: absolute
  width: $fix
  height: $fix
  border-radius: $fix
  box-shadow: inset $bs


.inner-shadow
  @extend .outer-shadow
  top: 50%
  left: 50%
  width: $w - ($low*2)
  height: $w - ($low*2)
  margin-left: -($w - ($low*2))/2
  margin-top: -($w - ($low*2))/2
  border-radius: $fix
  background-color: $bg
  box-shadow: $bs


#timer
  @extend .outer-shadow
  z-index: 1
  box-shadow: none


.hold
  position: absolute
  width: $fix
  height: $fix
  clip: rect(0px, $w, $w, $w/2)
  -webkit-border-radius: $fix
  background-color: #fff


.pie, .dot span
  background-color: $lc

.pie
  position: absolute
  width: $fix
  height: $fix
  -webkit-border-radius: $fix
  clip: rect(0px, $w/2, $w, 0px)


#left .pie
  z-index: 1
  -webkit-animation: left $tm/2 linear both

+keyframes(left)
  0%
    -webkit-transform: rotate(0deg)
  100%
    -webkit-transform: rotate(180deg)


#right
  z-index: 3
  -webkit-transform: rotate(180deg)


#right .pie
  -webkit-animation: right $tm/2 linear both
  -webkit-animation-delay: $tm/2


+keyframes(right)
  0%
    -webkit-transform: rotate(0deg)
  100%
    -webkit-transform: rotate(180deg)

.dot
  z-index: 2
  position: absolute
  left: 50%
  top: 50%
  width: 50%
  height: $low
  margin-top: -($low/2)
  -webkit-animation: dot $tm linear both
  -webkit-transform-origin: 0% 50%


.dot span
  position: absolute
  right: 0
  width: $low
  height: $low
  border-radius: $fix


+keyframes(dot)
  0%
    -webkit-transform: rotate(-90deg)
  50%
    -webkit-transform: rotate(90deg)
    z-index: 4
  100%
    -webkit-transform: rotate(270deg)
    z-index: 4
              
            
!

JS

              
                
              
            
!
999px

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