h = 0.1;

Point(1) = {0,  0, 0, h};
Point(2) = {10, 0, 0, h};
Point(3) = {10, 1, 0, h};
Point(4) = {0,  1, 0, h};
Point(6) = {0, 0.5, 0, h};
Point(7) = {10, 0.5, 0, h};
Point(5) = {5, 0.5, 0, h};
Line(1) = {1, 2};
Line(21) = {2, 7};
Line(22) = {7, 3};
Line(3) = {3, 4};
Line(41) = {4, 6};
Line(42) = {6, 1};
Line Loop(5) = {3, 41, 42, 1, 21, 22};
Plane Surface(6) = {5};
Physical Surface(7) = {6};
Point{5} In Surface{6};