## {4,4}, domino 1A1 + domino 1A1, solution 9
e2.
angleunit(pi/2)
# the line below lets us specify internal angles
angleofs(pi)
unittile(1,1,2,1,1,2)
unittile(1,1,2,1,1,2)
# the Conway notation
conway("(0 5)(1 1')(4 4')(2 0')(3 5')(2' 3')")
sublines(1)