Thanks! I was trying to do the Draw-a-Box lessons and was already annoyed before I got to the "draw 250 boxes" challenge. (There's good information in the free course, but I don't like how prescriptive it is about how you can only use a certain kind of pen and you have to do everything a certain kind of way.) And I think I'd be happy to draw 250 boxes if they were boxes but the rules have you drawing all the edges of your rectangular prism as if it were see-through and it's so ugly when you do that. So I got stubborn and started drawing Rubik's cubes instead and ... yikes ... I think I invented an even harder challenge for myself. I may just go back to the easier ugly boxes after all.