> >       ┏━┯━┯━┯━┯━┯━┯━┯━┓
> >       ┃　│　│　│　│　│　│　│　┃
> >       ┠─┼─┼─┼─┼─┼─┼─┼─┨
> >       ┃　│　│　│　│　│　│　│　┃
> >       ┠─┼─┼─┼─┼─┼─┼─┼─┨
> >       ┃　│　│　│　│　│　│　│　┃
> >       ┠─┼─┼─┼─┼─┼─┼─┼─┨
> >       ┃　│　│●│●│●│　│　│　┃
> >       ┠─┼─┼─┼─┼─┼─┼─┼─┨
> >       ┃　│　│○│○│●│　│　│　┃
> >       ┠─┼─┼─┼─┼─┼─┼─┼─┨
> >       ┃　│　│　│　│○│　│　│　┃
> >       ┠─┼─┼─┼─┼─┼─┼─┼─┨
> >       ┃　│　│　│　│　│○│　│　┃
> >       ┠─┼─┼─┼─┼─┼─┼─┼─┨
> >       ┃　│　│　│　│　│　│　│　┃
> >       ┗━┷━┷━┷━┷━┷━┷━┷━┛


参考：2000/10/03(火)15時37分49秒