The code used to generate the file can be found at https://github.com/litherum/AhemMaker (written in Swift). Please feel free to modify it in any way you like.

I modified the file in the most minimal way possible, without changing any of the strings inside the “name” table of the font. The name of the font is still Ahem, so it probably isn’t possible to install both this font and the old font at the same time.

For the vertical and horizontal stripes, I purposely placed them off-center so you could tell if the glyph is rotated 180°.

The result is attached. Please let me know if you have any problems with it.