.sk-folding-cube
  margin auto
  width 100%
  height 100%
  position relative
  transform rotateZ(45deg)

.sk-folding-cube .sk-cube
  float left
  width 50%
  height 50%
  position relative
  transform scale(1.1)

.sk-folding-cube .sk-cube:before
  content ''
  position absolute
  top 0
  left 0
  width 100%
  height 100%
  background-color linkColor
  animation sk-foldCubeAngle 2.4s infinite linear both
  transform-origin 100% 100%

.sk-folding-cube .sk-cube2
  transform scale(1.1) rotateZ(90deg)

.sk-folding-cube .sk-cube3
  transform scale(1.1) rotateZ(180deg)

.sk-folding-cube .sk-cube4
  transform scale(1.1) rotateZ(270deg)

.sk-folding-cube .sk-cube2:before
  animation-delay 0.3s

.sk-folding-cube .sk-cube3:before
  animation-delay 0.6s

.sk-folding-cube .sk-cube4:before
  animation-delay 0.9s

@keyframes sk-foldCubeAngle
  0%, 10%
    transform perspective(140px) rotateX(-180deg)
    opacity 0
   25%, 75%
    transform perspective(140px) rotateX(0deg)
    opacity 1
   90%, 100%
    transform perspective(140px) rotateY(180deg)
    opacity 0