Use this to get coordinates:
https://www.desmos.com/calculator
I tried with
(x-100)^2 + y^2 = 100
And for curve comamnd:
my_drone.curve( 0, 20, 60, 0, 180, 60, 20)
my_drone.ccw(180)
my_drone.curve( 0, 180, -60, 0, 20, -60, 20)
my_drone.ccw(180)
I haven't used X coordinate to make a vertical...