How to 'draft' extrude a curve

Hi there, I just started using grasshopper and I’m having a little problem,
I have a set of curves that I created using with kaleidoscope and Voronoi pattern.
and I want to extrude those lines, but I want that the base will be wide and the end of it will be really thin (this as the line of the curve).

I hope the pic will describe it better. Thanks! (32.7 KB)

I tried to do something similar to what you described. Find the grasshopper definition below. Hope this helps. :slight_smile: (42.7 KB)

Good Luck,