A beziergon is drawn as a series of cubic bezier curves and defined by a set of ordered bezier vertices.
A beziergon differs from a Papyrus::Bezierline in that the beziergon will be closed by drawing a cubic bezier curve from the last vertex to the first vertex.
For a discussion of bezier vertices and how the cubic bezier curves are defined see Papyrus::Bezierline.
If this beziergon contained three vertices, the following points would be present to define the following bezierline segments:
v0p0 v0p1 v0p2 v1p0 v1p1 v1p2 v2p0 v2p1 v2p2 |------ segment 1 ------| |------ segment 2 ------|
The beziergon would complete the shape by drawing a third bezier curve from v2p1 to v0p1 using v2p2 and v0p0 as control points.