how to make a page animation on html css code example

Example 1: animate.css

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/animate.css/4.1.1/animate.min.css" />

Example 2: css move animation

article {
    animation-name            : displaceContent;
    animation-duration        : 1s;
    animation-delay           : 4s;
    animation-iteration-count : 1;
    animation-fill-mode       : forwards;
}
@keyframes displaceContent {
    from { transform : translateY(0em) }
    to   { transform : translateY(3em) } /* slide down to make room for advertisements */
}