let n = (self.w + w as usize - 1) / w as usize;
            for _ in 0..self.drawn * n {

            let w = w as usize;
            for _ in 0..self.drawn {

            self.w = w as usize;

            self.w = w;

                c.render(&mut stdout, self.n_pre, self.n_post, w as usize)?;

                c.render(&mut stdout, self.n_pre, self.n_post, w)?;