I tried to contour a sphere in grasshopper but it failed

[jessyauu (ooo)]

I connect the sphere with Brep and it just showing a one line

and the effect i would like to create is like this

[laurent_delrieu]

Hello, at first glance It works here!

You must read what is indicated on the entries of the component, a screenshot for the D input.

So you have to chose the O or D input.
It could be good also if you could read some documentation
http://grasshopperprimer.com/en/
Then that

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