SOURCE

<div class="div container">
    <div class="div1">
        <div class="wave"></div>
    </div>
    <div class="div2"></div>
</div>

.div{
    width: calc(30px * 1.414);
    height: calc(30px);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}
.div1{
    transform:rotate(-45deg);
    position: relative;
    top:calc(30px * -0.17);
    z-index:2;
    width: 30px;
    height: 30px;
    background: red;
    -webkit-mask: 
        radial-gradient(10px,#fff 85%, transparent 101%) top left,
        radial-gradient(10px,#fff 85%, transparent 101%) bottom right,
        linear-gradient(to right,transparent 1%,#fff 3%) 0% calc(100% - 3px),
        linear-gradient(to top,transparent 1%,#fff 3%) 3px 100%,
        radial-gradient(4px at 100% 0%,#fff 50%, transparent 90%) 0% 100%;
    -webkit-mask-size: 
        66.66% 66.66%,
        66.66% 66.66%,
        64.66% calc(66.66% - 3px),
        calc(66.66% - 3px) 64.66%,
        3px 3px;
    -webkit-mask-repeat: no-repeat;
}
.div2{
    transform:rotate(-45deg) scale(1.05);
    position: absolute;
    top:calc(30px * -0.17);
    z-index:1;
    width: 30px;
    height: 30px;
    background: red;
    -webkit-mask: 
        radial-gradient(10px,#fff 85%, transparent 101%) top left,
        radial-gradient(10px,#fff 85%, transparent 101%) bottom right,
        linear-gradient(to right,transparent 1%,#fff 3%) 0% calc(100% - 3px),
        linear-gradient(to top,transparent 1%,#fff 3%) 3px 100%,
        radial-gradient(4px at 100% 0%,#fff 50%, transparent 90%) 0% 100%;
    -webkit-mask-size: 
        66.66% 66.66%,
        66.66% 66.66%,
        64.66% calc(66.66% - 3px),
        calc(66.66% - 3px) 64.66%,
        3px 3px;
    -webkit-mask-repeat: no-repeat;
}
.wave{
    transform:rotate(30deg);
    width: 30px;
    height: 30px;
}
.wave:before,
.wave:after{content: "";
position: absolute;
width: 1000px;
height: 1000px;
/* top: 0; */
/* top: -640px; */
/* top: -840px; */
top: -400px;
left:200px;
border-radius: 47%;
background-color: rgba(255,255,255,.4);
transform: translate(-55%,-56%) rotate(0deg);
animation: rotate 6s linear infinite;
z-index: 10;
}
.wave:after {
border-radius: 49%;
background-color: rgba(255,255,255,.9);
animation: rotate 7s linear -5s infinite;
z-index: 20;
}
@keyframes rotate {
    50%{
        transform: translate(-55%,-55.1%) rotate(180deg);
        }
    100%{
        transform: translate(-55%,-55%) rotate(360deg);
    }
}