Point(1) = {0,0,0, 0.2};
Point(2) = {1,0,0, 0.2};
Point(3) = {1,1,0, 0.2};
Point(4) = {0,1,0, 0.2};
Point(5) = {0,0,1, 0.2};
Point(6) = {0,1,1, 0.2};
Point(7) = {1,1,1, 0.2};
Point(8) = {1,0,1, 0.2};
Line(1) = {4,6} ;
Line(2) = {6,5} ;
Line(3) = {5,1} ;
Line(4) = {1,4} ;
Line(5) = {2,8} ;
Line(6) = {8,7} ;
Line(7) = {7,3} ;
Line(8) = {3,2} ;
Line(9) = {5,8} ;
Line(10) = {2,1} ;
Line(11) = {4,3} ;
Line(12) = {7,6} ;

Line Loop(1) = {1,2,3,4};       Plane Surface(1) = {1};
Line Loop(2) = {5,6,7,8};       Plane Surface(2) = {2};
Line Loop(3) = {-3,9,-5,10};    Plane Surface(3) = {3};
Line Loop(4) = {11,-7,12,-1};   Plane Surface(4) = {4};
Line Loop(5) = {-10,-8,-11,-4}; Plane Surface(5) = {5};
Merge "z1.msh"; // mesh file of face 6

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