Lisp request... trim (wall) lines with (column) multiple closed plines and circles

[ilarch2016]

HI~there 

First of all, thank you to anyone willing to help me.
I need a LISP routine.
Command name: CCW (Column Cut Wall)
The workflow is: first select the yellow layer (columns), then select the green layer (walls).
The routine should trim all wall lines that are inside the closed polylines on the column layer, including cutting and removing any wall lines that overlap with the column boundaries.

lisp request.dwg

Edited 8 hours ago by ilarch2016

[SLW210]

Try mine...