Grasshopper list item and sorting vectors


This might be a simple fix but i havent been able to get there just yet.
I would like to be able to connect the middle point in the red circle to the vector in the blue circle to create a diamond shape. not sure if I have to make a series or list item to be able to apply the line command to everything without connecting every single point. The goal is to create curves that connect the same way as the hidden lines in the sketch.
Any thoughts would be greatly appreciate it :pray:

2021-11-30_ (26.5 KB)
2021-11-30_ WoodFrameStructure_V2.3dm (1002.2 KB)

2021-11-30_ (162.3 KB)