VT100 line drawing characters, actually using the VT100 escapes
(B)0ooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo

lqqqqqqqqqqpoopqrssrqqqqqqqqqqwqqqqqqqqqqpoopqrssrqqqqqqqqqqk
x                             x                             x
x      ooh, swirly!           x       top right corner      x
x                             x                             x
tqqqqqqqqqqpoopqrssrqqqqqqqqqqnqqqqqqqqqqpoopqrssrqqqqqqqqqqu
x                             x                             x
x     stuff down here         x       is quite inane        x
x                             x                             x
mqqqqqqqqqqpoopqrssrqqqqqqqqqqvqqqqqqqqqqpoopqrssrqqqqqqqqqqj

(This won't do the right thing in PuTTY's default UTF-8 translation;
you'll just see lqqqk letters. It should work with a character set
like ISO8859-1.)