@keyframes rainbow-background{0%{background-color:red}10%{background-color:#f90}20%{background-color:#cf0}30%{background-color:#3f0}40%{background-color:#0f6}50%{background-color:#0ff}60%{background-color:#06f}70%{background-color:#30f}80%{background-color:#c0f}90%{background-color:#f09}to{background-color:red}}body{position:relative;overflow:hidden;margin:0;padding:0;animation:rainbow-background 30s infinite;animation-timing-function:linear;animation-direction:normal}.frame{position:absolute;width:100vw;height:100vh;x:0;y:0;border-width:0;z-index:10;background-color:#ffffff47}