@-webkit-keyframes check {
0% {
        height: 0;
        width: 0;
    }

    33.3333% {
        width: 20px;
        height: 0;
    }
  
}
@-moz-keyframes check {
    0% {
        height: 0;
        width: 0;
    }

    33.3333% {
        width: 20px;
        height: 0;
    }
}
@-ms-keyframes check {
    0% {
        height: 0;
        width: 0;
    }

    33.3333% {
        width: 20px;
        height: 0;
    }
}
@keyframes check {
    0% {
        height: 0;
        width: 0;
    }

    33.3333% {
        width: 20px;
        height: 0;
    }
}

.checkmark {
    padding: 10px;
    height: 100px;
    position: relative;
    width: 100px;
    margin: 20px;
    border-radius: 100px;
    border: 6px solid #73C2AD;
    display: inline-block;
}

.checkmark:after {
    -webkit-animation: check .8s;
    -moz-animation: check .8s ;
    -o-animation: check .8s;
    animation: check .8s;
}

.checkmark:after {
    -moz-transform: scaleX(-1) rotate(135deg);
    -ms-transform: scaleX(-1) rotate(135deg);
    -webkit-transform: scaleX(-1) rotate(135deg);
    transform: scaleX(-1) rotate(135deg);
    -moz-transform-origin: left top;
    -ms-transform-origin: left top;
    -webkit-transform-origin: left top;
    transform-origin: left top;
    border-right: 6px solid #73C2AD;
    border-top: 6px solid #73C2AD;
    content: '';
    display: block;
    height: 50px;
    position: absolute;
    width: 25px;
    margin: 38px 4px;
}