Don't take that to serious :D I wasn't able find curve or any parabolic shape so i took fib circles...maybe i have right or that just big coincidence.
Kommentera:
Or... i.imgur.com/RiTPiWX.png
Kommentera:
Even better. Sorry never used that fib circles
i.imgur.com/89YCOWX.png
i.imgur.com/89YCOWX.png