// Simple Square Periodic Mesh
lc = 1;

Point(1)  = { -1.0, -1.0, 0.0, lc};
Point(2)  = {  1.0, -1.0, 0.0, lc};
Point(3)  = {  1.0,  1.0, 0.0, lc};
Point(4)  = { -1.0,  1.0, 0.0, lc};


Line(5) = {1,2};
Line(6) = {2,3};
Line(7) = {3,4};
Line(8) = {4,1};

Line Loop(9) = {5,6,7,8};
Plane Surface(10) = {9};
