Add definition of recursion in docstring
@@ -4,7 +4,7 @@ Creates a sphere of radius r, centered at x0, y0, z0
Arguments (command line arguments)
----------
-rec : int, number of recursions for unit sphere.
+rec : int, number of recursions for unit sphere. (# of elements = 2^[(2*rec)+1])
r : float, radius.
x0 : float, x center of sphere.
y0 : float, y center of sphere.
