That is an awesome and well noble respected notion. Best of lucks.

As your completion I have skills in the physical arts. I did smirk at an idea though. A white flag with your dragons head on both sides. The words Puff above its head and lives below on both sides. However, I am unsure of anything of sailing flag requirements.

Still, Good luck.

Well, that is a very good idea. I think Puff is a different dragon and I couldn't impersonate him. (As lucky as he is, living by the sea) But the dragon's head its self is a perfectly acceptable design. It's simple and it represents me as the private signal is supposed to do. I think words would be challenging because they would read backwards on the opposite side and would be difficult to read when fluttering. The only real requirement is a simple design. I will probably have to make alterations anyway. If you put on paper I'll add you in the contest. ^_^

I apologize for apparently my dyslexia butchered my comment. "As for your competition I have no skill in the physical arts."
Sadly, yes I could not put it on paper if I tried. Thus, I must forfeit any such engagement. Just more of a indulgence in ideas.
I hope others have at least put some competition to the purple dolphin flag.