spinning-custom-logo.php

<?php
/**
 * Plugin Name: Spinning Custom Logo
 * Description: Make your custom logo spin!
 * Plugin URI: https://gist.github.com/westonruter/6920e17a1afd828d446d913105f0b755
 * Author Name: Weston Ruter
 * Author URI: https://weston.ruter.net/
 * License: GPLv2 or later
 */

add_action( 'wp_print_styles', function() {
	if ( ! has_custom_logo() ) {
		return;
	}
	?>
	<style>
		.custom-logo {
			animation: logo-spin 4s linear infinite;
		}
		@keyframes logo-spin {
			100% {
				transform:rotate(360deg);
			}
		}
	</style>
	<?php
} );