Offset direction in space - grasshopper

[kts.nguyenhoangloc (Loc)]

Hi all,
I have a list of points generated from previous steps.
In general, I have groups of 4 points in a same plane > Make closed poly-lines in each group > Offset outward those poly-lines.
However, I can not control the offset direction at final stage.
Any advice would be appreciated!
Thank you for your time!

offset-191002.gh (16.0 KB)

[HS_Kim]

Unify curve directions according to the given planes should work.

offset-191002_re.gh (14.8 KB)

[anon39580149]

[kts.nguyenhoangloc (Loc)]

Thank you @HS_Kim @anon39580149 it works well now