How do use new "Create mesh section' node?

Hi all,
So with the brand new 4.8 update there’s a new procedural mesh node called “create mesh section” node?

In my “vertices” array, I have 6 entries, with vertices called: A, B, C, D, E, & F.

I want to create 8 triangles with the following vertices:
ABC, DEF, CEB, EFB, BFA, FDA, ADC, & DCE

How do I do this?

Here’s a little illustration, essentially every three entries in the array is a vertice in each triangle.
The picture should explain it.

Hey thanks for that! I have a question… I’m trying to create a mesh cap using a spline. Do you have any ideas on how to procedurally set the order of the verts in the Triangles array based on the number of spline points? I have the spline points assigned to the Vertex array correctly