.spinner {
    /* margin: 100px auto; */
    width: 70px;
    height: 60px;
    text-align: center;
    font-size: 10px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}
.spinner > div {
    background-color: #fff;
    height: 100%;
    width: 6px;
    display: inline-block;
    -webkit-animation: sk-stretchdelay 1.2s infinite ease-in-out;
    animation: sk-stretchdelay 1.2s infinite ease-in-out;
}
.spinner .rect2 {
    -webkit-animation-delay: -1.1s;
    animation-delay: -1.1s;
}
.spinner .rect3 {
    -webkit-animation-delay: -1.0s;
    animation-delay: -1.0s;
}
.spinner .rect4 {
    -webkit-animation-delay: -0.9s;
    animation-delay: -0.9s;
}
.spinner .rect5 {
    -webkit-animation-delay: -0.8s;
    animation-delay: -0.8s;
}
@-webkit-keyframes sk-stretchdelay {
    0%, 40%, 100% { -webkit-transform: scaleY(0.4) }  
    20% { -webkit-transform: scaleY(1.0) }
}
@keyframes sk-stretchdelay {
    0%, 40%, 100% { 
        transform: scaleY(0.4);
        -webkit-transform: scaleY(0.4);
    } 20% { 
        transform: scaleY(1.0);
        -webkit-transform: scaleY(1.0);
    }
}