S_1 = (18.84, -5.72)
B = (15.96, -6.92)
k_2 = Circle(S_1, B)
f = Line(S_1, B)
C = Point(f)
k_1 = Circle(S_1, C)
S_4 = Midpoint(B, C)
e = Circle(S_1, S_4)
E = Intersect(k_1, f, 2)
S_5 = Midpoint(B, E)
g = Circle(S_1, S_5)
S_3 = Point(f)
k_3 = Circle(S_3, B)
a = 0 (slider from 0 to 2, step 1)
k_4 = Circle(S_4, C)
k_5 = Circle(S_5, B)