a = 0.8 (slider from 0 to 1, step 0.1)
b = 0.2617993877991494 (slider from 0 to 1.8325957145940461, step (1 / 24 * π))
b_s = CurveCartesian(t, b, t, 0, 1)
a_s = CurveCartesian(a, t, t, 0, (14 / 24 * π))
B = Point(b_s)
A = Point(a_s)
l1 = Sequence(CurveCartesian[a, t, t, 0, (14 / 24 * π)], a, 0, 1, 0.1)
l2 = Sequence(CurveCartesian[t, b, t, 0, 1], b, 0, (14 / 24 * π), (1 / 24 * π))
l3 = Sequence(CurveCartesian[(ℯ^(a) * cos(t)), (ℯ^(a) * sin(t)), t, 0, (14 / 24 * π)], a, 0, 1, 0.1)
bia = CurveCartesian((ℯ^(a) * cos(t)), (ℯ^(a) * sin(t)), t, 0, (14 / 24 * π))
l4 = Sequence(CurveCartesian[(exp(t) * cos(b)), (exp(t) * sin(b)), t, 0, 1], b, 0, (14 / 24 * π), (1 / 24 * π))
bib = CurveCartesian((ℯ^(t) * cos(b)), (ℯ^(t) * sin(b)), t, 0, 1)
A': ((exp(x(A)) * cos(y(A))), (exp(x(A)) * sin(y(A))))
B': ((ℯ^(x(B)) * cos(y(B))), (ℯ^(x(B)) * sin(y(B))))
C = (0.7947990843025469, -0.5854476590410129)
C': ((ℯ^(x(C)) * cos(y(C))), (ℯ^(x(C)) * sin(y(C))))