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