.preloader{
    height: 105px;
    width: 105px;
    margin: 0 auto;
    animation: loader-container 10s linear infinite;
}

.preloader > div{
    width: 44px;
    height: 44px;
    box-shadow: 0 0 8px -2px rgba(0,0,0,0.3);
    position: absolute;
    animation-duration: 1500ms;
    animation-timing-function: ease-in-out;
    animation-iteration-count: infinite;
}

.box1{
    background: linear-gradient(-45deg,#ff0000,#d60c0c);
    transform-origin: bottom center;
    top: 4px;
    left: 4px;
    animation-name: box1;
}

.box2{
    background: linear-gradient(-45deg,#15c109,#29870d);
    transform-origin: center left;
    top: 4px;
    right: 4px;
    animation-name: box2;
}

.box3{
    background: linear-gradient(-45deg,#c300ff,#a808a8);
    transform-origin: top center;
    bottom: 4px;
    right: 4px;
    animation-name: box3;
}

.box4{
    background: linear-gradient(-45deg,#fc8e28,#ea7e0b);
    transform-origin: center right;
    bottom: 4px;
    left: 4px;
    animation-name: box4;
}

@keyframes loader-container{
    0%{ transform: rotate(0); }
    23%{ transform: rotate(0); }
    25%{ transform: rotate(90deg); }
    48%{ transform: rotate(90deg); }
    50%{ transform: rotate(180deg); }
    73%{ transform: rotate(180deg); }
    75%{ transform: rotate(270deg); }
    98%{ transform: rotate(270deg); }
    100%{ transform: rotate(360deg); }
}

@keyframes box1{
    0%{ transform: perspective(200px) rotateX(90deg); }
    11%{ transform: perspective(200px) rotateX(0); }
    88%{ transform: perspective(200px) rotateX(0); }
    99%{ transform: perspective(200px) rotateX(90deg); }
    100%{ transform: perspective(200px) rotateX(90deg); }
}

@keyframes box2{
    0%{ transform: perspective(200px) rotateY(90deg); }
    11%{ transform: perspective(200px) rotateY(90deg); }
    22%{ transform: perspective(200px) rotateY(0); }
    77%{ transform: perspective(200px) rotateY(0); }
    88%{ transform: perspective(200px) rotateY(90deg); }
    100%{ transform: perspective(200px) rotateY(90deg); }
}

@keyframes box3{
    0%{ transform: perspective(200px) rotateX(-90deg); }
    22%{ transform: perspective(200px) rotateX(-90deg); }
    33%{ transform: perspective(200px) rotateX(0); }
    66%{ transform: perspective(200px) rotateX(0); }
    77%{ transform: perspective(200px) rotateX(-90deg); }
    100%{ transform: perspective(200px) rotateX(-90deg); }
}

@keyframes box4{
    0%{ transform: perspective(200px) rotateY(-90deg); }
    33%{ transform: perspective(200px) rotateY(-90deg); }
    44%{ transform: perspective(200px) rotateY(0); }
    55%{ transform: perspective(200px) rotateY(0); }
    66%{ transform: perspective(200px) rotateY(-90deg); }
    100%{ transform: perspective(200px) rotateY(-90deg); }
}