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HTML

              
                h1 focus
              
            
!

CSS

              
                @import compass

html, h1
  background: linear-gradient(90deg, #ECEDDC 50%, transparent 50%)
  background-size: 8px 8px
  background-color: #333
  -webkit-animation: focus 2s linear infinite
h1
  -webkit-animation-direction: reverse
  -webkit-text-fill-color: transparent
  -webkit-background-clip: text
  animation: focus 2s linear infinite
h1
  animation-direction: reverse
  text-fill-color: transparent
  background-clip: text
  position: absolute
  top: 0
  bottom: 0
  left: 0
  right: 0
  height: 96px
  margin: auto
  font: bold 96px sans-serif
  text-align: center
  text-transform: uppercase
    
@-webkit-keyframes focus
  from
    background-position: 0 0, 0 0, 0 0, 0 0
  to
    background-position: 24px 0, 24px 0, -24px 0, -24px 0

@keyframes focus
  from
    background-position: 0 0, 0 0, 0 0, 0 0
  to
    background-position: 24px 0, 24px 0, -24px 0, -24px 0
              
            
!

JS

              
                
              
            
!
999px

Console