How do I make it so I can paste HTML in places without the page translating it... like if I wanted to post a code for someone to use, how would I do that? Is there a code I have to put it between or something?

http://www.lissaexplains.com/fun5.shtml#xmp

or
<xmp>html code</xmp>

or
Use a text area
http://www.lissaexplains.com/html5.shtml#textarea