How can I connect the triangle's points?

[danivavi69]

Hi!
According to this picture, I need to find the way to draw that lines between the points.
Thanks for your help!
Example1.gh (5.1 KB)

[HS_Kim]

Example1_re.gh (8.7 KB)

[danivavi69]

Thank you so much Kim!
Your work help me to learn more.