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              <a id="button" href="#">
  <span></span>
  <span></span>
  <span></span>
</a>
            
          
!
            
              body
  background: #eee
  padding: 10%

#button
  width: 140px
  height: 140px
  border-radius: 50%
  background: #fff url('http://scottyzen.com/button/images/finger-print.png') no-repeat center
  background-size: contain
  display: block
  margin: auto
  position: relative
  box-shadow: 0 1px 10px 0 rgba(1, 1, 1, .2), 0 1.5px 4px 0 rgba(1, 1, 1, .2)
  &:hover
    span
      display: block
  span
    border-radius: 50%
    display: none
    position: absolute
    width: 160px
    height: 160px
    top: -10px
    left: -10px
    background-image: url('http://scottyzen.com/button/images/3.png')
    background-size: contain
    z-index: -1
    animation: spinner infinite 5s
  span:nth-child(2)
    background-image: url('http://scottyzen.com/button/images/2.png')
    animation: spinner infinite 6s
  span:nth-child(3)
    background-image: url('http://scottyzen.com/button/images/1.png')
    animation: spinner infinite 4s forwards


@keyframes spinner
  0%
    opacity: 0
    transform: rotate(0deg)

  20%
    opacity: 1

  33%
    transform: rotate(-180deg)
  66%
    transform: rotate(720deg)

  100%
    transform: rotate(0deg)

            
          
!
999px
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