Spherical based meter, is there an easy way?

I have decided to screw the ff7-ish slot thing and try a meter based attack instead, like in golf games.

Problem is, the rectangular based meter my friend helped me with, while operatitional, doesnt look that nice on my game, is there an easy way to make a sphere based meter, like from the aforementioned golf games?

Thanks in advance for the help :slight_smile: