@keyframes box-ani{
				from{
					transform: rotateY(0deg);
				}
				to{
					transform: rotateY(360deg);
				}
			}
			body{
				background-color: white;
			}
			#box{
				width: 250px;
				height: 250px;
				border: 2px solid black;
				position: fixed;
				left: calc(50% - 125px);
				top: calc(50% - 125px);
				transform: rotateX(10deg) rotateY(10deg);
				animation-name: box-ani;
				animation-duration: 20s;
				animation-iteration-count: infinite;
				animation-timing-function: linear;
				animation-play-state: paused;
			}