Projecting a curve on a surface (a sphere)

hello,
thanx for accepting me to the forum. i got my first grasshopper with rhino last week, so my skills are (clearly) limited yet.

i just started to learn basic functions and created an amount of projected curves around a sphere, with a definable offset to the sphere surface.

now i have

  • sphere (untrimmed surface)
  • a surface made from the curve (untrimmed)
  • the curve itself

but what ever i do, the curve do not project on surface…

i would be very gratefull for some tips with that !
thanx a lot

SPHERE:

THE CURVE (ELLIPSE) = TARGET

THE SOURCE (a surface from ellipse)

MAPPING OF THOSE 3

image

THE BLUE ELLIPSE ON A RED PLANE IN RHINO

stan