Here is one of my works that I composed at around seventeen or eighteen years of age, so expect a lot of immaturity. I can't remember, but I think that I was fascinated at the time by the use of alternating major and minor keys so I called it "Modes". Duh!
I ended on a unison tonic to let the listener choose major or minor. When you hear the last, sustained note, alternate between the two modes in your mind and make your choice.
My best to all,