.efekcahaya  {
  text-decoration: none;
  letter-spacing: 1px;
  display: inline-block;
  position: relative;
  -webkit-mask-image: linear-gradient(-75deg, rgba(0,0,0,.6) 80%, #000 90%, rgba(0,0,0,.6) 100%);
  -webkit-mask-size: 200%;
  animation: shine 2s linear infinite;
}

@keyframes shine {
  from { -webkit-mask-position: 150%; }
  to { -webkit-mask-position: -50%; }
}