Drawing a square halo

This design, while not very common, is pretty easy to do, especially if you usually use the optional step from the Basic Halo tutorial

Here's how to do this unique halo:
Complete the first four steps from Basic Halo tutorial. This leaves your design just short of being finished.
Lightly draw lines going diagonally inwards from the corners of the square. These lines should all be the same length; the point at the ends of the lines will become the corners of the second square.
Connect the ends of those lines to give your square halo its inner border.
Clean up for lines to finish the halo!