lc = 0.06;
lc2 = 3;
rayon = 0.6;
rayon2 = 12;
Point(1) = {rayon,0.0,0.0,lc};
Point(2) = {0.0,0.0,0.0,lc};
Point(3) = {-rayon,0.0,0.0,lc};
Point(4) = {-0.0,rayon,0.0,lc};
Point(5) = {-0.0,-rayon,0.0,lc};
Circle(1) = {5,2,1};
Circle(2) = {1,2,4};
Circle(3) = {4,2,3};
Circle(4) = {3,2,5};
Line Loop(5) = {2,3,4,1};
Plane Surface(6) = {5};

Point(11) = {rayon2,0.0,0.0,lc2};
Point(12) = {-rayon2,0.0,0.0,lc2};
Point(19) = {-0.0,rayon2,0.0,lc2};
Point(14) = {-0.0,-rayon2,0.0,lc2};
Circle(33) = {14,2,11};
Circle(34) = {11,2,19};
Circle(35) = {19,2,12};
Circle(36) = {12,2,14};
Line Loop(37) = {34,35,36,33};
Plane Surface(38) = {37,5};

Extrude {0,0,rayon} { 
  Surface{6, 38}; Layers {10};
}



