For sites that aren't public and to help Hypnotoad with world domination.
Fork or clone the repo and make adjustments or paste what's below in your html file.
<!doctype html><html class="no-js" lang="en"><head><meta charset="utf-8" /><meta http-equiv="x-ua-compatible" content="ie=edge"><meta name="viewport" content="width=device-width, initial-scale=1.0" /><link rel="apple-touch-icon" sizes="180x180" href="https://raw.githubusercontent.com/sixteenbit/hypnotoad/master/img/apple-touch-icon.png"><link rel="icon" type="image/png" sizes="32x32" href="https://raw.githubusercontent.com/sixteenbit/hypnotoad/master/img/favicon-32x32.png"><link rel="icon" type="image/png" sizes="16x16" href="https://raw.githubusercontent.com/sixteenbit/hypnotoad/master/img/favicon-16x16.png"><title>ALL GLORY TO THE HYPNOTOAD!</title><link rel="preconnect" href="https://fonts.gstatic.com"><link href="https://fonts.googleapis.com/css2?family=Anton&display=swap" rel="stylesheet"><style> body {margin: 0;padding: 15px;position: relative;height: 100vh;animation: colorchange 2.5s linear 1s infinite; /* animation-name followed by duration in seconds*//* you could also use milliseconds (ms) or something like 2.5s */-webkit-animation: colorchange 2.5s linear 0s infinite alternate; /* Chrome and Safari */} .content {position: absolute;top: 50%;left: 50%;transform: translate(-50%, -50%);} .content h1 {font-size: 48px;font-family: 'Anton', sans-serif;;text-align: center;-webkit-font-smoothing: antialiased;-moz-osx-font-smoothing: grayscale;} .hypnotoad {display: block;margin: 0 auto;width: 480px;max-width: 100%;height: auto;border: 0;} @keyframes colorchange { 0% {background: red;color: cyan;} 33% {background: green;color: magenta;} 66% {background: blue;color: yellow;} 100% {background: red;color: cyan;} } @-webkit-keyframes colorchange /* Safari and Chrome - necessary duplicate */{ 0% {background: red;color: cyan;} 33% {background: green;color: magenta;} 66% {background: blue;color: yellow;} 100% {background: red;color: cyan;} }</style></head><body><div class="content"><img class="hypnotoad" src="https://raw.githubusercontent.com/sixteenbit/hypnotoad/master/img/hypnotoad.gif" alt="ALL GLORY TO THE HYPNOTOAD!"><h1>ALL GLORY TO THE HYPNOTOAD!</h1></div></body></html>