RA = 1.47 (slider from 0 to 7, step 0.01)
A = (2, 0)
B = (6, 0)
c = Circle(A, RA)
Diff = 2 (slider from 0 to 10, step 0.1)
d = Circle(B, Diff + RA)
D, E = Intersect(d, c)