or you can just do it like this;
arrSquare = {
{0, 3, 0},
{1, 1, 1},
{1, 1, 1},
{1, 1, 1},
{1, 1, 1},
{1, 1, 1},
{1, 1, 1},
{1, 1, 1},
{1, 1, 1},
{1, 1, 1},
}
arrDiag = {
{1, 1, 0, 0, 0, 0, 0, 0, 0},
{1, 1, 1, 1, 0, 0, 0, 0, 0},
{0, 1, 1, 1, 0, 0, 0, 0...