html, body {
    height: 100%;
}

html {
    display: table;
    margin: auto;
    overflow: hidden;
}

body {
    font-family: monospace;
    display: table-cell;
    vertical-align: middle;
    margin:0;
    padding:0;
    background-color:#fff;
/*
    animation-name: example;
    animation-duration: 4s;
    animation-timing-function: ease-in-out;
    animation-iteration-count: infinite;
*/
}
/*

@keyframes example {
  0%   {background-color:pink;}
  50% {background-color:red;}
  100%   {background-color:pink;}
}
*/