Curve align to plane

[ahmetkemaneler]

hi guys. I’m newon grasshopper. so i have a problem with curves. I couldn’t align bottom curves of the dome to horizontal plane. Could anyone help me about that?
thanx.
.gh file added DOME_ALT ALIGN-3.gh (19.8 KB)

[HS_Kim]

Something like this?

DOME_ALT ALIGN-3_re.gh (23.1 KB)

[ahmetkemaneler]

absolutely yes.
thank you very much.