O: (0, 0)
a = 2.7 (slider from -5 to 10)
b = 2.4 (slider from -5 to 10)
A: (a, 0)
B: (0, b)
I: (1, 0)
J: (0, 1)
K: (1, 1)
B': (1, b)
A': (a, 1)
f = Ray(O, J)
g = Ray(O, I)
h = Line(B, B')
i = Line(A', A)
j = Segment(J, K)
k = Segment(K, I)
l = Segment(K, A')
m = Segment(K, B')
n = Line(O, K)
p = Line(A, B')
q = Line(B, A')