REFINE IN SIDE OF SQUARE
0.0 30.0 20.0 0.05 0.5 10 800
2 16 4 0
8 8 8 4
0 0 0 0
0.00  0.00
0.00  2.00
2.00  2.00
2.00  0.00
0.75  0.00
0.75  0.50
1.25  0.50
1.25  0.00
0.95  0.00
0.95  0.10
1.05  0.10
1.05  0.00
0.99  0.00
0.99  0.02
1.01  0.02
1.01  0.00
     1    -5    -6    -7     8     4     3     2
     5    -9   -10   -11    12    -8    -7    -6
     9   -13   -14   -15    16   -12   -11   -10
    13   -16   -15   -14