SubD in grasshopper

[TheFlash]

I would like to create mesh similar to this.I made some code,but I struggle to create mesh.Thank you in advance

sports halle-forum.gh (17.3 KB)

[René_Corella]

You can get to that mesh in many ways.

In this edit I simply took what you already had to achieve the clean SUBD:
sports halle-forum.gh (14.5 KB)