Monologues, monologues, i need monoluges?

So my culminating task starts tomorrow and I am freaking out I have no idea what to do. All we were told was that me have to do is a one-person show and we have to pick theme and I have no idea what theme to pick. I had the idea that I could do a theme about being naive but that is like innocence I someone in my cl is already doing that and I didn't want to see all emo and depressed because that might be to dark. I need help! This is worth 30% of my grade!