body{

    background-color: aqua;
}
.container{
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
}
.container.preloader{
    animation: rotate 2.3s cubic-bezier(0.75, 0, 0.5, 1) infinite;
}
@keyframes rotate{
    50% {
        transform: rotate(360deg);
    }
    100% {
        transform: rotate(720deg);
    }
}
.preloader span {
    position: absolute;
    display: block;
    height: 64px;
    width: 64px;
    background: purple;
    border: 1px solid purple;
    border-radius: 100%;
}
.preloader span:nth-child(1){
    transform: translate(-28px, -28px);
    animation: shape_1 2.3s cubic-bezier(0.75, 0, 0.5, 1)infinite;
}
@keyframes shape_1{
    60%{
        transform: scale(0.4);
    }
}
.preloader span:nth-child(2){
    transform: translate(28px,-28px);
    animation: shape_2 2.3s cubic-bezier(0.75, 0, 0.5, 1) infinite;
}
@keyframes shape_2{
    40%{
        transform: scale(0.4);
    }
}
.preloader span:nth-child(3){
    position: relative;
    border-radius: 0px;
    transform: scale(0.98)rotate(-45deg);
    animation: shape_3 2.3s cubic-bezier(0.75,0,0.5,1)infinite;
}
@keyframes shape_3{
    50%{
        border-radius: 100%;
        transform: scale(0.5)rotate(-45deg);
    }
    100%{
        transform: scale(0.98)rotate(-45deg);
    }
}
.shadow{
    position: relative;
    top: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: block;
    height: 16px;
    width: 64px;
    border-radius: 50%;
    background-color: #e4e3e3;
    border: 1px solid purple;
    animation: shadow 2.3s cubic-bezier(0.75, 0, 0.5, 1) infinite;
}
@keyframes shadow{
    50%{
    transform: translateX(-50%) scale(0.5);
    border-color: purple;
    }
}