\makeatletter

\pgfdeclareshape{stop}{%
  \savedanchor{\upperrightcorner}{
    \setlength{\pgf@xa}{\pgfshapeminwidth}
    \setlength{\pgf@ya}{\pgfshapeminheight}
    \pgf@x=0.5\pgf@xa
    \pgf@y=0.5\pgf@ya
  }
  \savedanchor{\lowerleftcorner}{
    \setlength{\pgf@xa}{\pgfshapeminwidth}
    \setlength{\pgf@ya}{\pgfshapeminheight}
    \pgf@x=-0.5\pgf@xa
    \pgf@y=-0.5\pgf@ya
  }

  \anchor{center}{\pgfpointorigin}
  % \anchor{center}{\centerpoint}
  \anchor{north east}{%
    \upperrightcorner%
  }
  \anchor{north}{%
    \upperrightcorner%
    \pgf@x=0pt
  }
  \anchor{south east}{%
    \upperrightcorner%
    \pgf@y=-\pgf@y
  }
  \anchor{south west}{%
    \lowerleftcorner%
  }
  \anchor{south}{%
    \lowerleftcorner%
    \pgf@x=0pt
  }
  \anchor{north west}{%
    \upperrightcorner%
    \pgf@x=-\pgf@x
  }
  \anchor{west}{%
    \lowerleftcorner%
    \pgf@y=0pt
  }
  \anchor{east}{%
    \upperrightcorner%
    \pgf@y=0pt
  }

  \savedanchor{\one}{
    \setlength{\pgf@xa}{\pgfshapeminwidth}
    \setlength{\pgf@ya}{\pgfshapeminheight}
    \pgf@x=-0.5\pgf@xa
    \pgf@y=0pt
    \advance\pgf@x by 0.5\pgf@ya
  }
  \anchor{one}{\one}

  \savedanchor{\two}{
    \setlength{\pgf@xa}{\pgfshapeminwidth}
    \setlength{\pgf@ya}{\pgfshapeminheight}
    \pgf@x=-0.5\pgf@xa
    \pgf@y=0pt
    \advance\pgf@x by 1.5\pgf@ya
  }
  \anchor{two}{\two}

  \savedanchor{\three}{
    \setlength{\pgf@xa}{\pgfshapeminwidth}
    \setlength{\pgf@ya}{\pgfshapeminheight}
    \pgf@x=-0.5\pgf@xa
    \pgf@y=0pt
    \advance\pgf@x by 2.5\pgf@ya
  }
  \anchor{three}{\three}

  \savedanchor{\four}{
    \setlength{\pgf@xa}{\pgfshapeminwidth}
    \setlength{\pgf@ya}{\pgfshapeminheight}
    \pgf@x=-0.5\pgf@xa
    \pgf@y=0pt
    \advance\pgf@x by 3.5\pgf@ya
  }
  \anchor{four}{\four}


  \savedanchor{\five}{
    \setlength{\pgf@xa}{\pgfshapeminwidth}
    \setlength{\pgf@ya}{\pgfshapeminheight}
    \pgf@x=-0.5\pgf@xa
    \pgf@y=0pt
    \advance\pgf@x by 4.5\pgf@ya
  }
  \anchor{five}{\five}

  \savedanchor{\six}{
    \setlength{\pgf@xa}{\pgfshapeminwidth}
    \setlength{\pgf@ya}{\pgfshapeminheight}
    \pgf@x=-0.5\pgf@xa
    \pgf@y=0pt
    \advance\pgf@x by 5.5\pgf@ya
  }
  \anchor{six}{\six}

  \savedanchor{\seven}{
    \setlength{\pgf@xa}{\pgfshapeminwidth}
    \setlength{\pgf@ya}{\pgfshapeminheight}
    \pgf@x=-0.5\pgf@xa
    \pgf@y=0pt
    \advance\pgf@x by 6.5\pgf@ya
  }
  \anchor{seven}{\seven}

  \savedanchor{\eight}{
    \setlength{\pgf@xa}{\pgfshapeminwidth}
    \setlength{\pgf@ya}{\pgfshapeminheight}
    \pgf@x=-0.5\pgf@xa
    \pgf@y=0pt
    \advance\pgf@x by 7.5\pgf@ya
  }
  \anchor{eight}{\eight}

  \savedanchor{\nine}{
    \setlength{\pgf@xa}{\pgfshapeminwidth}
    \setlength{\pgf@ya}{\pgfshapeminheight}
    \pgf@x=-0.5\pgf@xa
    \pgf@y=0pt
    \advance\pgf@x by 8.5\pgf@ya
  }
  \anchor{nine}{\nine}

  \savedanchor{\ten}{
    \setlength{\pgf@xa}{\pgfshapeminwidth}
    \setlength{\pgf@ya}{\pgfshapeminheight}
    \pgf@x=-0.5\pgf@xa
    \pgf@y=0pt
    \advance\pgf@x by 9.5\pgf@ya
  }
  \anchor{ten}{\ten}

  \backgroundpath{
    \pgfpathrectanglecorners{\lowerleftcorner}{\upperrightcorner}
  }
}

\makeatother