Číslo kroku

S = (7.783178911848521, -1.7715217467594147)
B = (12.26, -2)
k = Circle(S, B)
A = (8.64, -0.98)
d = Circle(A, B)
k' = Mirror(k, d)
f = Tangent(B, k')
k_1 = Mirror(f, d)
a = 0 (slider from 0 to 5, step 1)
S_1 = Center(k_1)