A = (5.04, -6.32)
S_1 = (17.78, -4.44)
f = Line(A, S_1)
C = Point(f)
k_1 = Circle(S_1, C)
a = 0 (slider from 0 to 3, step 1)
g, h = Tangent(f, k_1)
k_2 = Mirror(g, k_1)
k_3 = Mirror(h, k_1)
S_2 = Center(k_2)
S_3 = Center(k_3)