## {4,4}, tetromino 2 (L), solution 21
e2.
angleunit(pi/2)
# the line below lets us specify internal angles
angleofs(pi)
unittile(1,1,2,1,2,2,1,1,2,3)
# the Conway notation
conway("(0 7)[1 3][2 6](4 5)(8 9)")
sublines(1)