I sincerely apologize for this complete show of nubbishness but could someone either show me how you would make a piece of code to just even draw a pixel or point me to a site which has a tutorial on this?
anyone? dudes/dudettes
nehe.gamedev.net
More generally, set the contents of the correct adress in the framebuffer to what color you want the pixel to be. Then render it.
The GUI is made, like many people have said, by SDL, meaning pixel by pixel (I do not know SDL, but I would imagine they would have to put in the X and Y axis for lines, boxes or separate pixels)