JSFiddle - React, Tailwind, and code Playground

by Tankers

HTML

<div class="wrap">
<div class="top">

</div>
<div class="bott">

</div>

</div>

CSS

@keyframes half_spin {
		0% {
				-ms-transform: rotate(0deg);
				-moz-transform: rotate(0deg);
				-webkit-transform: rotate(0deg);
				-o-transform: rotate(0deg);
				transform: rotate(0deg);
		}
		40% {
				-ms-transform: rotate(20deg);
				-moz-transform: rotate(20deg);
				-webkit-transform: rotate(20deg);
				-o-transform: rotate(20deg);
				transform: rotate(20deg);
		}
		60% {
				-ms-transform: rotate(0deg);
				-moz-transform: rotate(0deg);
				-webkit-transform: rotate(0deg);
				-o-transform: rotate(0deg);
				transform: rotate(0deg);
		}
		80% {
				-ms-transform: rotate(-20deg);
				-moz-transform: rotate(-20deg);
				-webkit-transform: rotate(-20deg);
				-o-transform: rotate(-20deg);
				transform: rotate(-20deg);
		}
		100% {
				-ms-transform: rotate(0deg);
				-moz-transform: rotate(0deg);
				-webkit-transform: rotate(0deg);
				-o-transform: rotate(0deg);
				transform: rotate(0deg);
		}
}

.wrap {
  display: block;
  overflow: hidden;
  position: relative
}

.top {
  width: 300px;
  height: 150px;
  border: 1px solid red;
  border-bottom-left-radius: 151px;
  border-bottom-right-radius: 151px;
  position: relative;
  animation: half_spin 5000ms ease-in-out infinite;
}
.top:before {
  position: absolute;
  width: 100%;
  height: 1px;
  background: red;
  content: " ";
  top: 0;
  left: 0;
}
.bott {
  width: 300px;
  height: 150px;
  border: 1px solid black;
  border-top-left-radius: 151px;
  border-top-right-radius: 151px;
  animation: half_spin 5000ms ease-in-out infinite reverse;
  position: relative;
}
.bott:before {
  position: absolute;
  width: 100%;
  height: 1px;
  background: black;
  content: " ";
  bottom: 0;
  left :0;
}