a = 0 (slider from 0 to 5, step 1)
A_{1} = (10.58, -10.34)
B_{1} = (23.68, -4.56)
f = Line(A_{1}, B_{1})
S_1 = (13.8, -4.62)
D = (18.12, -10.2)
k_1 = Circle(S_1, D)
A = (17.28, -0.44)
g = Line(S_1, A)
B = Intersect(k_1, g, 2)
C = Midpoint(A, B)
c = Ellipse(S_1, A, C)
d = Parabola(A, f)
S_2 = Intersect(c, d, 2)
k_2 = Circle(S_2, A)
S_3 = Intersect(c, d, 1)
k_3 = Circle(S_3, A)