css key frame

1div {
2  width: 100px;
3  height: 100px;
4  background: red;
5  position: relative;
6  animation: mymove 5s infinite;
7}
8
9@keyframes mymove {
10  0% {top: 0px;}
11  50% {top: 50px;}
12  75% {top: 40px;}
13  100%{top: 0px;}
14}

1@keyframes mymove {
2  from {top: 0px;}
3  to {top: 200px;}
4}

1@keyframes mymove {
2  0% {top: 0px;}
3  50% {top: 50px;}
4  75% {top: 40px;}
5  100%{top: 0px;}
6}