## {4,7}, square 1R2 + square 1A2
h2.
angleunit(2*pi/7)
# the line below lets us specify internal angles
angleofs(pi)
distunit(edge(4,7))
unittile(1,1,1,1)
unittile(1,1,1,1)
unittile(1,1,1,1)
# the Conway notation
conway("(0)(1 0')(2)(3 0')(0'')(2'')(1'' 3')(3'' 3')(1' 2')")
sublines(1)