O = (9.22, 1.12)
B = (2.84, 3.74)
A = (10.24, 4.42)
f = Line(B, A)
M = Point(f)
M' = Mirror(M, O)
g = Segment(M, O)
h = Segment(O, M')
a = 0 (slider from 0 to 3, step 1)