The widget retrieves CSS and images from GitHub’s CDN. If you want to use local resources, add this script (customize the path):
Instead of uploading an image within the html of a page or with the WYSIWG tool of your site content editor, use this URL as the location of your image: /sanesartcounter-master/sane-sart-counter.php .
The full html (please add https://www. to the beginning of the URL below) to insert a dynamically generated image of the clock within the body of an email would be: