CSS 3 - PIE LOADER

CSS 3 LOADER ANIMATION WITH KEYFRAME

by LuckyCat

HTML

<div id="fxcl">
                <div class="wrapper">
                  <div class="pie spinner"></div>
                  <div class="pie filler"></div>
                  <div class="mask"></div>
                </div>
            </div>

CSS

#fxcl{
   position:fixed;
   top:50%;
   left:50%;
   margin-top:-50px;
   margin-left:-50px;
   display:block;
   width:100px;
   height:100px;
   z-index: 555;
   background:rgba(221,  221,  221,  0);
}


.wrapper {
  position: relative;
  margin: 40px auto;
  background: white;
}



.wrapper {
  width: 100px;
  height: 100px;
}

.wrapper .pie {
  width: 50%;
  height: 100%;
  -webkit-transform-origin: 100% 50%;
  -ms-transform-origin: 100% 50%;
  transform-origin: 100% 50%;
  position: absolute;
  background: #00e7b4;

}

.wrapper .spinner {
  border-radius: 100% 0 0 100% / 50% 0 0 50%;
  z-index: 200;
  border-right: none;
  -webkit-animation: rota 2s linear infinite;
  animation: rota 2s linear infinite;
}

.wrapper:hover .spinner,
.wrapper:hover .filler,
.wrapper:hover .mask {
  -webkit-animation-play-state: running;
  animation-play-state: running;
}

.wrapper .filler {
  border-radius: 0 100% 100% 0 / 0 50% 50% 0;
  left: 50%;
  opacity: 0;
  z-index: 100;
  -webkit-animation: opa 2s steps(1, end) infinite reverse;
  animation: opa 2s steps(1, end) infinite reverse;
  border-left: none;
}

.wrapper .mask {
  width: 50%;
  height: 100%;
  position: absolute;
  background: inherit;
  opacity: 1;
  z-index: 300;
  -webkit-animation: opa 2s steps(1, end) infinite;
  animation: opa 2s steps(1, end) infinite;
}
@keyframes rota {
  0% {
    -webkit-transform: rotate(0deg);
    transform: rotate(0deg);
  }

  100% {
    -webkit-transform: rotate(360deg);
    transform: rotate(360deg);
  }
}
@keyframes opa {
  0% {
    opacity: 1;
  }

  50%, 100% {
    opacity: 0;
  }
}