cl1 = 35;
lx = 100;
ly = 100;

Point(1) = {0, 0, 0, cl1};
Point(2) = {lx, 0, 0, cl1};
Point(3) = {lx, ly, 0, cl1};
Point(4) = {0, ly, 0, cl1};

Line(1) = {1, 2};
Line(2) = {2, 3};
Line(3) = {3, 4};
Line(4) = {4, 1};

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

Extrude {0, 0, 0.5*lx} {
  Surface{6};
}

Extrude {0, 0, 0.25*lx} {
  Surface{28};
}


Physical Surface(101) = {50, 6};
Physical Surface(102) = {19, 15, 27, 23, 49, 45, 41, 15, 37};

Physical Volume(204) = {1};
Physical Volume(205) = {2};

Mesh 3;

General.Trackball=1;
General.TrackballQuaternion0 = -0.5552173440099455;
General.TrackballQuaternion1 = -0.149247833784577;
General.TrackballQuaternion2 = -0.1664473918304832;
General.TrackballQuaternion3 = -0.7998462669625873;

Mesh.Normals = 40;

