In her two latest videos, maths-maven Vi Hart shows us how to draw fractals freehand, creating Koch curves, dragon curves, and eventually THREE DIMENSIONAL DUNGEONS – all with a little clever doodling.

It's captivating, to say the least. Episode one is up top, episode two down below. Unfamiliar with Vi Hart? What are you even doing with your life? More goodness from Hart here and here.

H/t Laughing Squid.