Construction detail: Glass panel

[spitsfire8172 (Gerard Blas)]

Hello, I’m trying to move all four lines that touch the vertex at the same time.

So far, I can only reduce the length of one line,

but the idea is that all four lines move simultaneously when I use the Extend Curve.
I’ve attached the file; I hope you can understand the idea. Thank you.

Construction detail Glass panel.3dm (825.5 KB)

Construction detail Glass panel.gh (8.1 KB)

[Erik_Beeren]

You need four line segments if you want four lines to become shorter

[spitsfire8172 (Gerard Blas)]

Thank You so much.