M1 = 1.3 (slider from 0 to 2, step 0.1)
M2 = 1 (slider from 0 to 4, step 0.5)
c = 10 (slider from 0 to 10, step 0.1)
A: ((c * M2) / (M1 + M2), 0)
R_1 = 0.7 (slider from 0 to 5, step 0.1)
c_1: x^(2) + y^(2) = R_1
R_2 = 1.2 (slider from 0 to 5, step 0.1)
d: (x - c)^(2) + y^(2) = R_2