Trying to infinitely loop a complex css animation (border runs around edge of a circle) -


i'm trying create infinite animation new stroke around circle runs around circumference. stroke blue, when reaches 360 degrees, appears disappear in same direction. essentially, similar animation running on group of elements in colors reversed.

i'd have loop infinitely loading state. right can described behavior run once. i'm stuck on having loop, meaning blue border returns again after disappears , on. snippet included demo -

body {    padding: 0;    margin: 0;  }    .outer, .inner, .cover {    border-radius: 50%;    height: 200px;    width: 200px;    box-sizing: border-box;  }    .outer {    background: linear-gradient(to right, transparent 0%, transparent 50%, #7db9e8 50%, #7db9e8 100%);    position: absolute;    top: 0;  }    .outer.opp {    background: linear-gradient(to right, #7db9e8 0%, #7db9e8 50%, transparent 50%, transparent 100%);  }    .inner {    background: linear-gradient(to right, transparent 0%, transparent 50%, #ccc 50%, #ccc 100%);    padding: 5px;    -webkit-animation: spin 5s 2s linear forwards;  }    .inner.opp {    background: linear-gradient(to right, #ccc 0%, #ccc 50%, transparent 50%, transparent 100%);    -webkit-animation: spin2 5s 7s linear forwards;  }    .cover {    background: #ccc;    height: 190px;    width: 190px;    position: absolute;    top: 5px;    left: 5px;    z-index: 5;  }    img {    margin-left: 35px;    margin-top: 45px;  }    @-webkit-keyframes spin {    0% {      -webkit-transform: rotate(0);    }    99.99% {      background: linear-gradient(to right, transparent 0%, transparent 50%, #ccc 50%, #ccc 100%);    }    100% {      -webkit-transform: rotate(-180deg);      background: linear-gradient(to right, transparent 0%, transparent 50%, transparent 50%, transparent 100%);    }  }    @-webkit-keyframes spin2 {    0% {      -webkit-transform: rotate(0);    }    99.99% {      background: linear-gradient(to right, #ccc 0%, #ccc 50%, transparent 50%, transparent 100%);    }    100% {      background: linear-gradient(to right, transparent 0%, transparent 50%, transparent 50%, transparent 100%);      -webkit-transform: rotate(-180deg);    }  }    /****** start css gray border animation *******/    .gray {    opacity: 0;    -webkit-animation: appear 0s 12s forwards;    position: absolute;    top: 0px;  }    .gray .outer {    background: linear-gradient(to right, transparent 0%, transparent 50%, #ccc 50%, #ccc 100%);  }    .gray .outer.opp {    background: linear-gradient(to right, #ccc 0%, #ccc 50%, transparent 50, transparent 100%);  }    .gray .inner {    background: linear-gradient(to right, transparent 0%, transparent 50%, #7db9e8 50%, #7db9e8 100%);    -webkit-animation: spin-gray 5s 12s linear forwards;  }    .gray .inner.opp {    background: linear-gradient(to right, #7db9e8 0%, #7db9e8 50%, #ccc 50%, #ccc 100%);    -webkit-animation: spin-gray2 5s 17s linear forwards;  }    @-webkit-keyframes appear {    0% {      opacity: 0;    }    100% {      opacity: 1;    }  }    @-webkit-keyframes spin-gray {    0% {      -webkit-transform: rotate(0);    }    99.99% {      background: linear-gradient(to right, transparent 0%, transparent 50%, #7db9e8 50%, #7db9e8 100%);    }    100% {      -webkit-transform: rotate(-180deg);      background: linear-gradient(to right, transparent 0%, transparent 50%, transparent 50%, transparent 100%);    }  }    @-webkit-keyframes spin-gray2 {    0% {      -webkit-transform: rotate(0);    }    100% {      -webkit-transform: rotate(-180deg);    }  }
<div class="opp outer">    <div class="opp inner">    </div>  </div>  <div class="outer">    <div class="inner">    </div>  </div>    <div class="gray">    <div class="opp outer">      <div class="opp inner">      </div>    </div>    <div class="outer">      <div class="inner">      </div>    </div>  </div>    <div class="cover">  <img src="http://media.giphy.com/media/ahkpxstxvnf56/giphy.gif" height="90"></div>

figured out. used 2 clipped divs overlaying div revealed. in clipped divs single div rounded corners. each associated looping animation. 1 delayed simulate single seamless effect. not perfect solution since blue peeking bit outside gray circle, not bad.

however, clipping property not supported in ie, ff, , versions of android 4. sigh

.blue-circle {    background: blue;    border-radius: 50%;    height: 150px;    position: relative;    width: 150px;  }    .cover {    background: lightgray;    border-radius: 50%;    height: 130px;    left: 0;    margin: auto;    position: absolute;    right: 0;    top: 10px;    width: 130px;  }    .left-half, .right-half {    height: 100%;    display: inline-block;    overflow: hidden;    width: 50%;  }    .left-half {    left: 0;  }    .left-half-circle {    background: lightgray;    border-radius: 50%;    height: 100%;    width: 200%;    -webkit-clip-path: polygon(50% 0, 0 0, 0 100%, 50% 100%);    clip-path: polygon(50% 0, 0 0, 0 100%, 50% 100%);    -webkit-animation: rotate-half-circle 16s 4s linear infinite;    -webkit-transform: translatez(0);  }    .right-half {    position: relative;  }    .right-half-circle {    background: lightgray;    border-radius: 50%;    height: 100%;    position: absolute;    right: 0;    width: 200%;    -webkit-clip-path: polygon(100% 0, 50% 0, 50% 100%, 100% 100%);    clip-path: polygon(100% 0, 50% 0, 50% 100%, 100% 100%);    -webkit-animation: rotate-half-circle 16s 0s linear infinite forwards;    -webkit-transform: translatez(0);  }    @-webkit-keyframes rotate-half-circle {    0% {      -webkit-transform: rotate(0deg);    }    25% {      -webkit-transform: rotate(180deg);    }    50% {      -webkit-transform: rotate(180deg);    }    75% {      -webkit-transform: rotate(360deg);    }    100% {      -webkit-transform: rotate(360deg);    }  }
<div class="blue-circle">    <div class="left-half">      <div class="left-half-circle">      </div>    </div><!--    --><div class="right-half">      <div class="right-half-circle">      </div>    </div>    <div class="cover-wrapper">      <div class="cover">        <img src="http://media.giphy.com/media/ahkpxstxvnf56/giphy.gif" height="90" style="margin-top:15px;">      </div>    </div>  </div>


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