index.html

<div class="loadcenter">
    <div class="loadcenter_wrap">
      <svg class="l1" width="320px" height="320px">
        <path d="M160,0.5C212.9,53.4,319.5,160,319.5,160 L160,319.5L0.5,160L160,0.5z"></path>
      </svg>
      <svg class="l2" width="320px" height="320px">
        <path d="M160,40.5C184,64.5,279.5,160,279.5,160 L160,279.5L40.5,160L160,40.5z"></path>
      </svg>
      <svg class="l3" width="320px" height="320px">
        <path d="M160,80.5c21.7,21.7,79.5,79.5,79.5,79.5 L160,239.5L80.5,160L160,80.5z"></path>
      </svg>
    </div>
  </div>

loader-from-http:--letters-inc.jp-.markdown

loader from http://letters-inc.jp/

loader from http://letters-inc.jp/

A Pen by LegoMushroom on CodePen.

License.

style.css

body{
  background-color: black;
}


.loadcenter_wrap {
    position: relative;
    -moz-perspective: 500px;
    -webkit-perspective: 500;
    -o-perspective: 500;
    -ms-perspective: 500;
}
.loadcenter_wrap p {
    position: absolute;
    z-index: 2;
    width: 100%;
    text-align: center;
    color: #fff;
}
.loadcenter {
    height: 320px;
    width: 320px;
    margin: -160px 0 0 -160px;
    top: 50%;
    left: 50%;
    position: absolute;
}
.loadcenter svg {
    position: absolute;
    top: 0;
    left: 0;
    -webkit-transform-origin: center center;
    -ms-transform-origin: center center;
    -o-transform-origin: center center;
    transform-origin: center center;
    -webkit-transition: all 0.3s;
    -o-transition: all 0.3s;
    transition: all 0.3s;
    -webkit-transform: rotateY(0deg);
    -ms-transform: rotateY(0deg);
    -o-transform: rotateY(0deg);
    transform: rotateY(0deg);
}
.loadcenter path {
    fill: none;
    stroke: #fff;
    stroke-width: 1;
    fill: none;
    -webkit-transition: all .3s;
    -o-transition: all .3s;
    transition: all .3s;
}
.loadcenter .l1 path {
    stroke-dasharray: 450;
    stroke-dashoffset: 900;
    -webkit-animation: LOADING1 4s linear 0s infinite;
    -o-animation: LOADING1 4s linear 0s infinite;
    animation: LOADING1 4s linear 0s infinite;
}
.loadcenter .l2 path {
    stroke-dasharray: 340;
    stroke-dashoffset: 340;
    animation: LOADING2 3s linear 0s infinite;
}
.loadcenter .l3 path {
    stroke-dasharray: 230;
    stroke-dashoffset: 230;
    animation: LOADING3 2s linear 0s infinite;
}


@keyframes LOADING1 {
    0% {
        stroke-dashoffset: -900;
    }

    50% {
        stroke-dashoffset: 0;
    }

    100% {
        stroke-dashoffset: 900;
    }
}


@keyframes LOADING2 {
    0% {
        stroke-dashoffset: 340;
    }

    50% {
        stroke-dashoffset: 0;
    }

    100% {
        stroke-dashoffset: -340;
    }
}


@keyframes LOADING3 {
    0% {
        stroke-dashoffset: -230;
    }

    50% {
        stroke-dashoffset: 0;
    }

    100% {
        stroke-dashoffset: 230;
    }
}


.loadcenter_wrap .l1 {
    animation: TURN 2.5s linear 0s infinite;
}
.loadcenter_wrap .l2 {
    animation: TURN 2s linear 0s infinite;
}
.loadcenter_wrap .l3 {
    animation: TURN 1.5s linear 0s infinite;
}


@-webkit-keyframes TURN {
    0% {
        -webkit-transform: rotateY(0deg);
        opacity: 1
    }

    25% {
        -webkit-transform: rotateY(90deg);
        opacity: .6
    }

    50% {
        -webkit-transform: rotateY(180deg);
        opacity: 1
    }

    75% {
        -webkit-transform: rotateY(270deg);
        opacity: .6
    }

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

    25% {
        -webkit-transform: rotateY(270deg);
        opacity: .6
    }

    50% {
        -webkit-transform: rotateY(180deg);
        opacity: 1
    }

    75% {
        -webkit-transform: rotateY(90deg);
        opacity: .6
    }

    100% {
        -webkit-transform: rotateY(0deg);
        opacity: 1
    }
}