Below is from the source of a site doing what I want
I really don't know what I'm doing. I just started looking into this yesterday.
I wasn't sure if what you said before would be exactly what I needed, but it may be I really don't know.
I just want them to be able to click on the word black and change the background to black and the text to white, but the next time they visit my site if they want to see the black background again they would have to click on black again.
I don't know much about php and thought that there might be a copy and paste script to put in the html and then just add similar links like in my first message here.
I would be nice to save it in a cookie but to be honest it looks kind of tricky to accomplish especially since I've never done it before and seems to require a lot of information that I don't already know.
Thats why I was trying to find the easiest route possible.