a = 6
t = 0 (slider from 0 to 10, step 0.01)
A = (0, 0)
c = Circle((0, 0), t)
L1 = Sequence(Circle[(cos(s), sin(s)), t - 1], s, 0, 6.283185307179586, 2 * 3.141592653589793 / a)
L2 = Sequence(Circle[(2 * cos(s), 2 * sin(s)), t - 2], s, 0, 6.283185307179586, 2 * 3.141592653589793 / (2 * a))
L3 = Sequence(Circle[(3 * cos(s), 3 * sin(s)), t - 3], s, 0, 6.283185307179586, 2 * 3.141592653589793 / (3 * a))
L4 = Sequence(Circle[(4 * cos(s), 4 * sin(s)), t - 4], s, 0, 6.283185307179586, 2 * 3.141592653589793 / (4 * a))
L5 = Sequence(Circle[(5 * cos(s), 5 * sin(s)), t - 5], s, 0, 6.283185307179586, 2 * 3.141592653589793 / (5 * a))