.sk-folding-cube {
    margin: 20px auto;
    width: 40px;
    height: 40px;
    position: relative;
    -webkit-transform: rotateZ(45deg);
            transform: rotateZ(45deg);
}

.sk-folding-cube .sk-cube {
    float: left;
    width: 50%;
    height: 50%;
    position: relative;
    -webkit-transform: scale(1.1);
        -ms-transform: scale(1.1);
            transform: scale(1.1); 
}
.sk-folding-cube .sk-cube:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #CA2A33;
    -webkit-animation: sk-foldCubeAngle 2.4s infinite linear both;
            animation: sk-foldCubeAngle 2.4s infinite linear both;
    -webkit-transform-origin: 100% 100%;
        -ms-transform-origin: 100% 100%;
            transform-origin: 100% 100%;
}
.sk-folding-cube .sk-cube2 {
    -webkit-transform: scale(1.1) rotateZ(90deg);
            transform: scale(1.1) rotateZ(90deg);
}
.sk-folding-cube .sk-cube3 {
    -webkit-transform: scale(1.1) rotateZ(180deg);
            transform: scale(1.1) rotateZ(180deg);
}
.sk-folding-cube .sk-cube4 {
    -webkit-transform: scale(1.1) rotateZ(270deg);
            transform: scale(1.1) rotateZ(270deg);
}
.sk-folding-cube .sk-cube2:before {
    -webkit-animation-delay: 0.3s;
            animation-delay: 0.3s;
}
.sk-folding-cube .sk-cube3:before {
    -webkit-animation-delay: 0.6s;
            animation-delay: 0.6s; 
}
.sk-folding-cube .sk-cube4:before {
    -webkit-animation-delay: 0.9s;
            animation-delay: 0.9s;
}
@-webkit-keyframes sk-foldCubeAngle {
    0%, 10% {
        -webkit-transform: perspective(140px) rotateX(-180deg);
                transform: perspective(140px) rotateX(-180deg);
        opacity: 0; 
    } 25%, 75% {
        -webkit-transform: perspective(140px) rotateX(0deg);
                transform: perspective(140px) rotateX(0deg);
        opacity: 1; 
    } 90%, 100% {
        -webkit-transform: perspective(140px) rotateY(180deg);
                transform: perspective(140px) rotateY(180deg);
        opacity: 0; 
    } 
}

@keyframes sk-foldCubeAngle {
    0%, 10% {
        -webkit-transform: perspective(140px) rotateX(-180deg);
                transform: perspective(140px) rotateX(-180deg);
        opacity: 0; 
    } 25%, 75% {
        -webkit-transform: perspective(140px) rotateX(0deg);
                transform: perspective(140px) rotateX(0deg);
        opacity: 1; 
    } 90%, 100% {
        -webkit-transform: perspective(140px) rotateY(180deg);
                transform: perspective(140px) rotateY(180deg);
        opacity: 0; 
    }
}

#overlay{
    height:100%;
    width:100%;
    background:rgba(255, 255, 255, 0.9);
    position:fixed;
    z-index: 9999;
    left:0;
    top:0;
}
#overlay div {
    top: 45%;
    float: middle;
    margin-left: auto;
    margin-right: auto;
}