R21 = (0, -2)
R22 = (15, 1)
f = Line(R21, R22)
R11 = (0, -3)
R12 = (15, -3)
g = Line(R11, R12)
A1 = Point(g)
B2 = Point(f)
h = Segment(A1, B2)
C1 = Point(g)
j = Segment(B2, C1)
A2 = Point(f)
p = Line(A2, j)
D = Intersect(g, p)
l = Line(D, h)
i = Line(C1, h)
C2 = Point(f)
A = Intersect(f, i)
k = Line(A, j)
B = Intersect(f, l)
m = Line(B, j)
n = Line(A2, h)