Include "num.geo";

lc1 = 0.25;
lc2 = 5;

Point(1) = {0, 0, 0, lc1};
Point(2) = {r0, 0, 0, lc1};
Point(3) = {0, -r0, 0, lc1};
Point(4) = {r1, 0, 0, lc2};
Point(5) = {0, -r1, 0, lc2};
Circle(1) = {2, 1, 3};
Circle(2) = {4, 1, 5};

Line(3) = {2, 4};
Line(4) = {3, 5};
Line Loop(5) = {4, -2, -3, 1};
Plane Surface(6) = {5};

Physical Line(Earth_Electrode) = {1};
Physical Line(Reference_Ground) = {2};
Physical Surface(Soil) = {6};
