Hey there! Hopefully your brain juices are starting to flow a bit, ha! One idea I have is to think about all the concepts of the brain you know and see how you might relate to them! For instance, the brain is separated into three different sections which have distinct purposes. If you feel that you, as a person, have three goals or three personality traits you think (white) matter most, you can definitely play into that realm a bit! Or, since the brain is all about connections, it might be fun to play around with the connections in your own life. Obviously, don't take these as your only two options, especially since these ideas are just a tad uninspired, but please use these to jumpstart your thinking if you find them helpful!
Hopefully this helps (and the brain puns weren't too bad)! :D