Wave pattern on Surface

Hello experts,

I’m trying to create wave curves on Closed surface (pls download attached image of surface),
But stuck in gradient scaling (small extrusion on top and bottom of v shape and 1.00 scale factor on mid. (extrusion means V shape ( screenshot 3)
Pls guide me what are the step to do it.

I used this method to control width of V shape ( Screenshot 4 explains )

or If my approach is not in right direction pls guide me.

—————————-Plugins used in this script——————————

BlueOrange by wucl12 (‘unspecified version’)
Heteroptera by Amin Bahrami, Helioripple (7.9.6)
Flexibility by Ehsan.Samadi (22.6.2)
Pufferfish by Michael Pryor (3.0.0.0)

V pattern on surface v2.gh (38.0 KB)