WordPress if post.php but only for one Custom Post Type

This is for the back end. The admin area. I have a script to run some functions but only for the Events custom post type created by the Events Calendar. Currently I have this script running in my functions.php:

if ($page == "post-new.php" OR $page == "post.php" ) {
    do something.....;
}

So it works, but on anything with post-new.php or post.php. Not good since this involves fields only related to the Events CPT. How can I get it to work exclusively on this CPT?