@-webkit-keyframes pulse {
    0% {
        opacity: 1;
    }

    16.666% {
        opacity: 1;
    }

    100% {
        opacity: 0;
    }
}

@-moz-keyframes pulse {
    0% {
        opacity: 1;
    }

    16.666% {
        opacity: 1;
    }

    100% {
        opacity: 0;
    }
}

@keyframes pulse {
    0% {
        opacity: 1;
    }

    16.666% {
        opacity: 1;
    }

    100% {
        opacity: 0;
    }
}

body {
    background: #e4e4e5;
}

.triangles {
    -webkit-transform: translate(-50%, -50%);
    -moz-transform: translate(-50%, -50%);
    -ms-transform: translate(-50%, -50%);
    -o-transform: translate(-50%, -50%);
    transform: translate(-50%, -50%);
    height: 81px;
    width: 90px;
    position: absolute;
    left: 50%;
    top: 50%;
}

.tri {
    position: absolute;
    -webkit-animation: pulse 750ms ease-in infinite;
    -moz-animation: pulse 750ms ease-in infinite;
    animation: pulse 750ms ease-in infinite;
    border-top: 27px solid #215A6D;
    border-left: 15px solid transparent;
    border-right: 15px solid transparent;
    border-bottom: 0px;
}

    .tri.invert {
        border-top: 0px;
        border-bottom: 27px solid #215A6D;
        border-left: 15px solid transparent;
        border-right: 15px solid transparent;
    }

    .tri:nth-child(1) {
        left: 30px;
    }

    .tri:nth-child(2) {
        left: 15px;
        top: 27px;
        -webkit-animation-delay: -125ms;
        -moz-animation-delay: -125ms;
        animation-delay: -125ms;
    }

    .tri:nth-child(3) {
        left: 30px;
        top: 27px;
    }

    .tri:nth-child(4) {
        left: 45px;
        top: 27px;
        -webkit-animation-delay: -625ms;
        -moz-animation-delay: -625ms;
        animation-delay: -625ms;
    }

    .tri:nth-child(5) {
        top: 54px;
        -webkit-animation-delay: -250ms;
        -moz-animation-delay: -250ms;
        animation-delay: -250ms;
    }

    .tri:nth-child(6) {
        top: 54px;
        left: 15px;
        -webkit-animation-delay: -250ms;
        -moz-animation-delay: -250ms;
        animation-delay: -250ms;
    }

    .tri:nth-child(7) {
        top: 54px;
        left: 30px;
        -webkit-animation-delay: -375ms;
        -moz-animation-delay: -375ms;
        animation-delay: -375ms;
    }

    .tri:nth-child(8) {
        top: 54px;
        left: 45px;
        -webkit-animation-delay: -500ms;
        -moz-animation-delay: -500ms;
        animation-delay: -500ms;
    }

    .tri:nth-child(9) {
        top: 54px;
        left: 60px;
        -webkit-animation-delay: -500ms;
        -moz-animation-delay: -500ms;
        animation-delay: -500ms;
    }