

C = 0.1; // 0.03; 

R = 1;
L = 5;

Point(1) = {0,0,0,C};	
Point(2) = {R,0,0,C};
Point(3) = {-R,0,0,C};
Point(4) = {0,-R,0,C};
Point(5) = {0,R,0,C};

Circle(1) = {2,1,5};
Circle(2) = {5,1,3};
Circle(3) = {3,1,4};
Circle(4) = {4,1,2};

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

Extrude {0,0,L} {
  Surface{6}; 
  Layers{10,1};   
  Recombine;
}



Physical Surface(100) = {23, 27, 15, 19};
Physical Surface(300) = {28};
Physical Surface(200) = {6};
Physical Volume(1000) = {1};
