## {3,7}, triangle 1R + diamond 1F, solution 4
h2.
angleunit(2*pi/7)
# the line below lets us specify internal angles
angleofs(pi)
distunit(edge(3,7))
unittile(1,1,1)
unittile(1,2,1,2)
# the Conway notation
conway("(0 0')(1 0')(2 0')[1' 3'](2')")
sublines(1)