Voronoi code

Hi guys,

I have to do grasshopper code to my study and i hope that u can help me.

I want to do a necklace and i have a problem to voronoi the loft. I was trying to do this by BBox > Volume > Scale NU > Pop3D > Voronoi > BBX > Explode > Pipe, but it didn't work. Could u tell me some advice how i should do my voronoi neckles? 

the image below shows a necklace i made by another method, but it completely doesn't work