## {4,4}, square 1R2 + domino 1R
e2.
angleunit(pi/2)
# the line below lets us specify internal angles
angleofs(pi)
unittile(1,1,1,1)
unittile(1,1,2,1,1,2)
# the Conway notation
conway("(0 0')(1 1')(2 3')(3 4')(2')(5')")
sublines(1)