## {3,7}, diamond 1R + diamond 1F + diamond 1F, solution 2
h2.
angleunit(2*pi/7)
# the line below lets us specify internal angles
angleofs(pi)
distunit(edge(3,7))
unittile(1,2,1,2)
unittile(1,2,1,2)
unittile(1,2,1,2)
# the Conway notation
conway("(0)(1 1')(2)(3 1')(0' 1'')(2' 0'')(3')(2'' 3'')")
sublines(1)