## {3,9}, diamond 1S + diamond 1S, solution 1
h2.
angleunit(2*pi/9)
# the line below lets us specify internal angles
angleofs(pi)
distunit(edge(3,9))
unittile(1,2,1,2)
unittile(1,2,1,2)
# the Conway notation
conway("(0 0')(1 1')(2 2')(3 3')")
sublines(1)