S_1 = (2.165, 2.2054)
B = (3.6896, 5.2304)
k_1 = Circle(S_1, B)
S_2 = (7.68, 1.98)
D = (3.44, 2.22)
k_2 = Circle(S_2, D)
A = (3.9074, 1.673)
a = 0 (slider from 0 to 5, step 1)
C = (2.649, 0.4146)
ω = Circle(A, C)
c = Mirror(k_1, ω)
d = Mirror(k_2, ω)
f, g = Tangent(c, d)
Intersect(-0.31083491218184545x² - 0.06572005103373837x y + 1.999532731104556y² + 0.8946418688045341x - 5.591532973634283y = -6.316863513083362, c)
k_3 = Mirror(g, ω)
k_4 = Mirror(f, ω)
S_3 = Center(k_3)
S_4 = Center(k_4)