A_{1} = (9.66, -9.88)
T = (16.8, -8)
f = Line(A_{1}, T)
a = 0 (slider from 0 to 5, step 1)
g = OrthogonalLine(T, f)
S_1 = Point(g)
k_1 = Circle(S_1, T)
A = (17.76, -4.26)
h = Line(A, T)
A' = Intersect(k_1, h, 2)
i = Line(S_1, A')
j = Line(A, i)
S_2 = Intersect(g, j)
k_2 = Circle(S_2, A)