If the image is not that large, that does not mean it cannot be used - in the next section you'll learn how to configure backgrounds for Xanga so that any image at all - even a 1x1 pixel dot - can be used as an environment for your content.
If you have enough control of your website, and also have the expertise in HTML and PHP to configure that kind of front end and back end, you can find a variety of scripts on the web at places like Hotscripts.
Regardless of your choice, most scripts come with directions of how to configure the code exactly to do what you need, and usually in a safe way that will protect both your server and your end user.
Assuming you've already had your web host administrator configure the server to accept PHP scripts, then the web server will display this page just as it would any other HTML page that you create.
The drawback to using a stand-alone counter is that it can be more complicated to configure, and as the web designer, you need to have access to the CGI-BIN scripting area of the web server.