I did not check the code before my first reply. It seems to me, that you are creating Gcode for printer and you need to create bottom spiral to create solid “floor”.
Here is my dirty solution.
Used component from Thread by @laurent_delrieu
Spirale.gha (21 KB)
(Do not forgot to ublock the file)
base test_by dan.gh (28.6 KB)
base test_by dan.3dm (181.3 KB)
cheers
D.