void manage_halo(void);

}
void manage_halo()
{
    int radius = halo_radius();
    if (radius == 0)
        return;
    int monster = -1;
    // Backlight an invisible player inside a halo.
    if (you.duration[DUR_INVIS] && !you.duration[DUR_BACKLIGHT])
        you.duration[DUR_BACKLIGHT] = 1;
    for (int x = -radius; x <= radius; x++)
        for (int y = -radius; y <= radius; y++)
        {
            int posx = you.x_pos + x;
            int posy = you.y_pos + y;
            int dist = _inside_circle(posx, posy, radius);
            if (dist != -1)
            {
                monster = mgrd[posx][posy];
                // Backlight invisible monsters inside a halo.
                if (monster != NON_MONSTER)
                {
                    monsters *mon = &menv[monster];
                    if (mon->has_ench(ENCH_INVIS)
                        && !mon->has_ench(ENCH_BACKLIGHT))
                    {
                        mon->add_ench(mon_enchant(ENCH_BACKLIGHT, 0,
                                      KC_YOU, 10));
                    }
                }
            }
        }

                manage_halo();

            manage_halo();

                {

                    manage_halo();
                }

        manage_halo();

    // Invisible monsters inside a halo get backlight.
    if (inside_halo(x, y))
        manage_halo();

        // invisible monsters inside a halo don't lose backlight
        if (has_ench(ENCH_INVIS) && inside_halo(x, y))
            add_ench(mon_enchant(ENCH_BACKLIGHT, 0, KC_YOU, 10));
        else if (!quiet)

        if (!quiet)

        // Invisible players inside a halo get backlight.
        if (halo_radius())
            manage_halo();

        // An invisible player inside a halo doesn't lose backlight.
        if (you.duration[DUR_INVIS] && halo_radius())
            you.duration[DUR_BACKLIGHT] = 1;
        else
            mpr("You are no longer glowing.", MSGCH_DURATION);

        mpr("You are no longer glowing.", MSGCH_DURATION);

    manage_halo();