.bg_load {
    position: fixed;
    left: 0px;
    top: 0px;
    width: 100%;
    height: 100%;
    background: white;
}

.wrapper {
    /* Size and position */
    font-size: 25px; /* 1em */
    width: 8em;
    height: 8em;
    position: fixed;
    left: 50%;
    top: 50%;
    margin-top: -100px;
    margin-left: -100px;
}

.wrapper:before,
.wrapper:after {
    content: "";
    position: absolute;
    z-index: -1;
}

.wrapper:before {
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
}

.wrapper:after {
    top: 1em;
    right: 1em;
    bottom: 1em;
    left: 1em;
}

.wrapper .inner {
    width: 100%;
    height: 100%;
}