function count = doEdges(piece, l, w)
global newCount


for i = 2:(l - 1)
    if piece(i, 1) == 0
        if piece(i - 1, 1) || piece(i + 1, 1) || piece(i, 2)
            newPiece = piece;
            newPiece(i, 1) = 1;
            tryPiece(newPiece);
        end
    end
    if piece(i, w) == 0
        if piece(i - 1, w) || piece(i + 1, w) || piece(i, w - 1)
            newPiece = piece;
            newPiece(i, w) = 1;
            tryPiece(newPiece);
        end
    end
end

for j = 2:(w - 1)
    if piece(1, j) == 0
        if piece(1, j - 1) || piece(1, j + 1) || piece(2, j)
            newPiece = piece;
            newPiece(1, j) = 1;
            tryPiece(newPiece);
        end
    end
    if piece(l, j) == 0
        if piece(l, j - 1) || piece(l, j + 1) || piece(l - 1, j)
            newPiece = piece;
            newPiece(l, j) = 1;
            tryPiece(newPiece);
        end
    end
end

count = newCount;