Is there any cool hex code?

Im admittedly not very good with stuff like this and i know little but i was wondering if there is any cool hex code to do fun things like with OD you can overlay things is there anything that does something thats interesting or something? also i have no clue what it is but the language ^0 = the color black is there anything cool you can do with that like making it cycle color or something i know i m a total n00b or whatever but anyhelp is appreciated.