Some sort of variable?
 

I looked at the code of the main theme on my site, and it references things like :SITENAME: and :SIDEFEED: .

How can I make my own?

Well you can modify enddayne's template on your own, simply open the html file templates/simple/template.html and find the corresponding codes to edit. Do not remove copyrights though, unless you have her permission.

I didn't remove any copyrights, just so you know. ^^

I have nothing in /simple except the inc folder and starter.html.

Oh I am sorry the html file is named starter.html in Mys v1.1.x series. Open it with a text editor and change the site name and site owner part of the codes.

I try that, but what I don't understand is, how were each of the variable things like :SITENAME: and :SIDEFEED: were defined - that's what I'm trying to find out.

Well this is not what I am talking about. The site name and slogan can be edited in admin control panel. Near the bottom of the page you should be able to find a line that looks like this:

Edit the 'your site' and 'your name' parts to whatever you like, and leave the rest of codes unchanged.

What I was originally asking is, where are the variables like in;

defined?

Oh this is actually not PHP. I believe it is referenced to the site settings you can manually edit in admin control panel though.

You want to make one of those?
just put something like this before the echo $template line
now in the template .html file, just a put the :NEWVAR: whereever you want. But don't forget to define the $newvar variable in the .php file else it will be blank

Thank you fadillzzz! :)

lol unfortunately the code I'm trying to make appear using that messes up regardless...but I'll keep that for future reference. :)