Adding background to the entire page

[turbochef]

I'm trying to set the background to the entire page using

            sheet.col_style 1, bg, row_offset:1
            sheet.col_style 2, bg, row_offset:1
                            ....
            sheet.col_style 14, bg, row_offset:1

But it only works on initialized cells.

How do I make it span the entire page?

[laptopmutia]

did anyone found answer to this problemo?