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