Select the opposite surfaces of a grid

Grasshopper
1

Hi everyone.
just a quick one.
i need a way to select the negative faces of a grid in grasshopper created with isotrim commend.
thanks!

Canvas at 12;20;56
Canvas at 12;20;56954×664 83.8 KB

Canvas at 12;21;45
Canvas at 12;21;451628×303 61.1 KB

DimondHelp.gh (14.7 KB)

2

Diamond
Diamond1920×294 40.6 KB

Diamond.gh (11.5 KB)

3

:rofl: How long do you think it takes to understand and answer your question? :man_facepalming:

4

Given my ignorance of Kangaroo, I would have solved it thusly:

image
image2681×681 188 KB

DiamondHelp.gh (26.0 KB)

5

Thank you so much!
just what i needed.