Or, if not linear, at least kind of slug-shaped.
I used a little face-drawing crayon type thingy to do this. I think it was German.
Again, German face crayon.
I used black liquid eyeliner.
THE END 8D
It actually ends up looking a lot better than my digital drawing skills are capable of conveying:
(oh yeah, I also underlined the bottoms of my eyes. If you couldn't tell. And added moar blood.)