lc=0.5;

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

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


Line Loop(13) = {1, 2, 3, 4};
Plane Surface(14) = {13};
Recombine Surface{14};
Extrude {0, 0, 5} { Surface{14}; Layers{15}; Recombine; }



