Rotate lower part of object and keep upper part unrotated

Grasshopper
1

Hi, is there anyone who can help me with this issue:
Rotate the Upper part of an object (R) and keep the lower part (F) unrotated as shown below?

image
image464×538 28.3 KB

Q2.gh (7.4 KB)

2

Q2_2021Oct21a
Q2_2021Oct21a907×546 44.5 KB

Q2_2021Oct21a.gh (6.8 KB)

1 Like
3

Excellent :ok_hand:
Thank you for your help.