RA0 = 3.1 (slider from 0 to 5, step 0.1)
RB0 = 1.3 (slider from 0 to 5, step 0.1)
S = 0 (slider from -5 to 5, step 0.1)
D = -0.2 (slider from -5 to 5, step 0.1)
FF = 3 (slider from 0 to 12, step 0.1)
A: (-1.0 * 1.0 * FF / 2.0, 0.0)
B: (FF / 2.0, 0.0)
c = Circle(A, RA0 + S + D)
d = Circle(B, RB0 - S + D)
C, E = Intersect(c, d)