This took a few hours in total to do, I think, I worked on this for 10-30mins in every session.
I was working late on this a few days ago, and my tablet shut down because it was out of battery. I was just too tired to go looking around for the charger so I left it that way, and charged it the next day. The drawing was still there, and the timer was running, that's why the timer's so unbelievably long for this drawing. It did still take a while, though. I think I'm getting the hang of oekaki.

