2    dimension

-1.0 -1.0   x_low
 1.0  1.0   x_high
  80   80   n_cells
   1    1   n_ghost_cells

5    number of grids

-1.0 -1.0   x_low
 0.0  0.0   x_high

 0.0  0.0   x_low
 1.0  1.0   x_high

-0.5  0.0   x_low
 0.0  0.5   x_high
 
 0.0 -0.5   x_low
 0.5  0.0   x_high

-0.7  0.0   x_low
-0.5  0.2   x_high
