User:Maevings/userpage.css

@keyframes rainbowbackground{
   0%{background: red;}
   14%{background: orange;}
   28%{background: yellow;}
   42%{background: lime;}
   56%{background: cyan;}
   70%{background: blue;}
   84%{background: #FF00FF;}
   100%{background: red;}
}

.rainbow {
        animation: 5s background
infinite;
}