body {
background: linear-gradient(-45deg, #ee7752, #e73c7e, #23a6d5, #23d5ab,#23d5ab, #ee7752, #e73c7e, #23a6d5, #23d5ab);
background-size: 244% 333%;
animation: gradient 5s linear infinite;
height: 100vh;
}
@keyframes gradient {
100% {
background-position: 100% 100%;
}
}
This Pen doesn't use any external JavaScript resources.