No its not on the preview, but half of mario's head from the smb nes sprite is on there somewhere.  And there's a triforce too

Thanks for comments.  I make the big squares base colours first trying to make it so that none touching are the same, then I use the other colours to fill them in randomly, but trying to keep the shape that it needs or the main shade that it needs to make the picture as a whole work.  The further you are away the more it should look like a rose.  I also snuck a couple of nintendo pixels in there... but that was for me  (see if you can find them)