Add content after body

/* Add content after body */
function add_content_after_body() {
    ?>
    <style>
        .wrapper_facebook_promote {
            background-color: #4267B2; /* Color of Facebook */
            position:fixed; /* Make Position fixed || Sticky */
            z-index:99; /* Make content to the front */
            top: 0; /* Make to the top */
            width: 100%;
        }

        .wrapper_facebook_promote h1{
            color: white;
        }
    </style>
    <div class="wrapper_facebook_promote" align="center">
        <h1>Promote Facebook Groups</h1>
        <a href="facebook.com">
            <image src="https://www.technitiate.com/wp-content/uploads/2017/04/Facebook-banner.png" width="100%">
        </a>
    </div>
    <?php
}
add_action( 'jnews_after_body', 'add_content_after_body' );