body{
    background-color: black;
}
.loading{
    height: 100px;
    width: 100px;
    border: 6px solid aqua;
    border-radius: 4px;
    box-shadow: 0 0 8px aqua, 0 0 8px aqua inset;
    position: absolute;
    top: 50%;
    left: 50%;
    translate: -50%  -50%;
    z-index: 10;
    animation: 2s loading ease-in-out infinite;
}

@keyframes loading{
    0%{transform: rotateX(0) rotateY(0) rotateZ(0);}
    33%{transform: rotateX(180deg) rotateY(0) rotateZ(0);}
    67%{transform: rotateX(180deg) rotateY(180deg) rotateZ(0);}
    100%{transform: rotateX(180deg) rotateY(180deg) rotateZ(180deg);}
}