I modified the challenge a wee bit. I didn't use the same paper for the various drawings since I was using (top row, left to right) hard graphite pencils (3H to HB), watercolor pencils, (bottom row, left to right) brush pens and ballpoint pen. These media work best on very different paper textures and moisture absorbing qualities. The second picture shows the object of my study --- and the apparatus I use to hold botanical subjects. "Third hand" tools are very useful and cheap. This one was under $10 and serves my purposes well. Just FYI. (Each drawing/painting was scanned and composited in Photoshop.)
This picture was a participation to one of Creads' contest. I had to create a mascot for a french animation convention, with the theme CMYK. So... hu... I actually don't remember why I made the kitty six limbed, but hey, I'm not surprised by myself. Contest page https://app.creads.fr/u/recherche-illustrateur-dessinateur/concours-japanexpo-chara-design-2017/creation/417135/show