basic plugin for addthisevent.com with detailed comments

gistfile1.txt

<?php 
/**
 * Plugin Name: Add This Event JS.
 * Plugin URI: https://addthisevent.com/
 * Description: Simply adds the addthisevent.com js to the footer.
 * Version:1.0.0
 * Author: Tom Woodward
 * Author URI: http://bionicteaching.com
 * License: GPL2
 */
 
 //register  scripts
function ate_scripts() {
    wp_register_script( 'add_this_event', //give the script a handle
                       'https://addthisevent.com/libs/1.5.8/ate.min.js', //location of an external script
                       array(), //put any scripts that have to load first for this script to work between the ()
                       'scriptversion 1.5.8', //script version
                       true); //true to put it in the footer, false to put it in the header
    wp_register_script( 'add_this_events_prefs',
                        plugins_url( '/js/prefs.js', __FILE__ ), //location of an internal plugin script, like Spanish adj goes first
                        array(add_this_event), //this script is reliant on the add_this_event
                        '1',
                        true);
    wp_register_style('add_this_event_css', //loads a CSS file, note small differences from js loading style vs script
                        plugins_url( '/ate.css', __FILE__ ),
                        array(),
                        '1',
                        'all'); //media type
//enque scripts
    wp_enqueue_script('add_this_event');  //enque the script by its handle
    wp_enqueue_script('add_this_events_prefs');
    wp_enqueue_style('add_this_event_css'); //enque the style by its handle
 
 
}
add_action( 'wp_enqueue_scripts', 'ate_scripts' );