#text{
  text-align: center;
  font-size: 700px;
  animation: dance 5s infinite;
  animation-timing-function: linear;
}

body{
  animation:dance 5s infinite;
  animation-timing-function:linear;
  animation-direction: reverse;
  color:red;
}

@keyframes dance{
  0% {color:red;}
  20%{color:orange;}
  40%{color:yellow;}
  50%{color:green;}
  60%{color:teal;}
  70%{color:blue;}
  80% {color:indigo;}
  90% {color:purple;}
  100%{color:red;}
}