attrclr
attrclr(ip, 0, 0, ip->rows, ip->cols);
attrclr(ip, ip->cury, ip->cols - n, 1, n);
attrclr(ip, ip->cury, ip->curx, 1, n);
attrclr(ip, y, x, 1, ip->cols - x);
attrclr(ip, y, 0, 1, x);
attrclr(ip, y, 0, 1, ip->cols);
attrclr(ip, ip->cury, 0, ip->rows - ip->cury, ip->cols);
attrclr(ip, 0, 0, ip->cury, ip->cols);
attrclr(ip, 0, 0, ip->rows, ip->cols);
attrclr(ip, ip->bottom_margin - n + 1, 0, n, ip->cols);
attrclr(ip, ip->cury, 0, n, ip->cols);
attrclr(ip, ip->cury, ip->curx + n, 1, 1);
attrclr(sc, 0, 0, sc->rows, sc->cols);
attrclr(sc, sc->cury, sc->cols - n, 1, n);
attrclr(sc, sc->cury, sc->curx, 1, n);
attrclr(sc, y, x, 1, sc->cols - x);
attrclr(sc, y, 0, 1, x);
attrclr(sc, y, 0, 1, sc->cols);
attrclr(sc, sc->cury, 0, sc->rows - sc->cury, sc->cols);
attrclr(sc, 0, 0, sc->cury, sc->cols);
attrclr(sc, 0, 0, sc->rows, sc->cols);
attrclr(sc, sc->bottom_margin - n + 1, 0, n, sc->cols);
attrclr(sc, sc->cury, 0, n, sc->cols);
attrclr(sc, sc->cury, sc->curx + n, 1, 1);
attrclr(ip, y, 0, 1, x);
attrclr(ip, y, 0, 1, ip->cols);
attrclr(ip, ip->cury, 0, ip->rows - ip->cury, ip->cols);
attrclr(ip, 0, 0, ip->cury, ip->cols);
attrclr(ip, 0, 0, ip->rows, ip->cols);
attrclr(ip, ip->bottom_margin - n + 1, 0, n, ip->cols);
attrclr(ip, ip->cury, 0, n, ip->cols);
attrclr(ip, ip->cury, ip->curx + n,
attrclr(ip, 0, 0, ip->rows, ip->cols);
attrclr(ip, 0, 0, ip->rows, ip->cols);
attrclr(ip, ip->cury, ip->cols - n, 1, n);
attrclr(ip, ip->cury, ip->curx, 1, n);
attrclr(ip, y, x, 1, ip->cols - x);