tetrahedron orientation -12
\documentclass[tikz]{standalone}

\usepackage{pgflibraryshapes}
\usetikzlibrary{backgrounds}
\usetikzlibrary{arrows}
\begin{document}
\begin{tikzpicture}[scale = 0.5,font=\fontsize{8}{8}\selectfont]
\path (-2.,2.,2.) node(1_0) [draw,shape=circle,color=gray] {1};
\path (2.,-2.,2.) node(2_0) [draw,shape=circle,color=gray] {2};
\path (-2.,-2.,2.) node(3_0) [draw,shape=circle,color=gray] {3};
\path (-2.,-2.,-2.) node(4_0) [draw,shape=circle,color=gray] {4};
\draw[color=gray] (1_0) -- (2_0);
\draw[color=gray] (2_0) -- (3_0);
\draw[color=gray] (3_0) -- (1_0);
\draw[color=gray] (1_0) -- (4_0);
\draw[color=gray] (4_0) -- (2_0);
\draw[color=gray] (3_0) -- (4_0);
\path (-1.,-1.,1.) node(0_0) [] {};
\end{tikzpicture}
\end{document}
tetrahedron orientation -11
\documentclass[tikz]{standalone}

\usepackage{pgflibraryshapes}
\usetikzlibrary{backgrounds}
\usetikzlibrary{arrows}
\begin{document}
\begin{tikzpicture}[scale = 0.5,font=\fontsize{8}{8}\selectfont]
\path (-2.,2.,2.) node(1_0) [draw,shape=circle,color=gray] {1};
\path (-2.,-2.,-2.) node(2_0) [draw,shape=circle,color=gray] {2};
\path (2.,-2.,2.) node(3_0) [draw,shape=circle,color=gray] {3};
\path (-2.,-2.,2.) node(4_0) [draw,shape=circle,color=gray] {4};
\draw[color=gray] (1_0) -- (2_0);
\draw[color=gray] (2_0) -- (3_0);
\draw[color=gray] (3_0) -- (1_0);
\draw[color=gray] (1_0) -- (4_0);
\draw[color=gray] (4_0) -- (2_0);
\draw[color=gray] (3_0) -- (4_0);
\path (-1.,-1.,1.) node(0_0) [] {};
\end{tikzpicture}
\end{document}
tetrahedron orientation -10
\documentclass[tikz]{standalone}

\usepackage{pgflibraryshapes}
\usetikzlibrary{backgrounds}
\usetikzlibrary{arrows}
\begin{document}
\begin{tikzpicture}[scale = 0.5,font=\fontsize{8}{8}\selectfont]
\path (-2.,2.,2.) node(1_0) [draw,shape=circle,color=gray] {1};
\path (-2.,-2.,2.) node(2_0) [draw,shape=circle,color=gray] {2};
\path (-2.,-2.,-2.) node(3_0) [draw,shape=circle,color=gray] {3};
\path (2.,-2.,2.) node(4_0) [draw,shape=circle,color=gray] {4};
\draw[color=gray] (1_0) -- (2_0);
\draw[color=gray] (2_0) -- (3_0);
\draw[color=gray] (3_0) -- (1_0);
\draw[color=gray] (1_0) -- (4_0);
\draw[color=gray] (4_0) -- (2_0);
\draw[color=gray] (3_0) -- (4_0);
\path (-1.,-1.,1.) node(0_0) [] {};
\end{tikzpicture}
\end{document}
tetrahedron orientation -9
\documentclass[tikz]{standalone}

\usepackage{pgflibraryshapes}
\usetikzlibrary{backgrounds}
\usetikzlibrary{arrows}
\begin{document}
\begin{tikzpicture}[scale = 0.5,font=\fontsize{8}{8}\selectfont]
\path (2.,-2.,2.) node(1_0) [draw,shape=circle,color=gray] {1};
\path (-2.,2.,2.) node(2_0) [draw,shape=circle,color=gray] {2};
\path (-2.,-2.,-2.) node(3_0) [draw,shape=circle,color=gray] {3};
\path (-2.,-2.,2.) node(4_0) [draw,shape=circle,color=gray] {4};
\draw[color=gray] (1_0) -- (2_0);
\draw[color=gray] (2_0) -- (3_0);
\draw[color=gray] (3_0) -- (1_0);
\draw[color=gray] (1_0) -- (4_0);
\draw[color=gray] (4_0) -- (2_0);
\draw[color=gray] (3_0) -- (4_0);
\path (-1.,-1.,1.) node(0_0) [] {};
\end{tikzpicture}
\end{document}
tetrahedron orientation -8
\documentclass[tikz]{standalone}

\usepackage{pgflibraryshapes}
\usetikzlibrary{backgrounds}
\usetikzlibrary{arrows}
\begin{document}
\begin{tikzpicture}[scale = 0.5,font=\fontsize{8}{8}\selectfont]
\path (-2.,-2.,-2.) node(1_0) [draw,shape=circle,color=gray] {1};
\path (-2.,2.,2.) node(2_0) [draw,shape=circle,color=gray] {2};
\path (-2.,-2.,2.) node(3_0) [draw,shape=circle,color=gray] {3};
\path (2.,-2.,2.) node(4_0) [draw,shape=circle,color=gray] {4};
\draw[color=gray] (1_0) -- (2_0);
\draw[color=gray] (2_0) -- (3_0);
\draw[color=gray] (3_0) -- (1_0);
\draw[color=gray] (1_0) -- (4_0);
\draw[color=gray] (4_0) -- (2_0);
\draw[color=gray] (3_0) -- (4_0);
\path (-1.,-1.,1.) node(0_0) [] {};
\end{tikzpicture}
\end{document}
tetrahedron orientation -7
\documentclass[tikz]{standalone}

\usepackage{pgflibraryshapes}
\usetikzlibrary{backgrounds}
\usetikzlibrary{arrows}
\begin{document}
\begin{tikzpicture}[scale = 0.5,font=\fontsize{8}{8}\selectfont]
\path (-2.,-2.,2.) node(1_0) [draw,shape=circle,color=gray] {1};
\path (-2.,2.,2.) node(2_0) [draw,shape=circle,color=gray] {2};
\path (2.,-2.,2.) node(3_0) [draw,shape=circle,color=gray] {3};
\path (-2.,-2.,-2.) node(4_0) [draw,shape=circle,color=gray] {4};
\draw[color=gray] (1_0) -- (2_0);
\draw[color=gray] (2_0) -- (3_0);
\draw[color=gray] (3_0) -- (1_0);
\draw[color=gray] (1_0) -- (4_0);
\draw[color=gray] (4_0) -- (2_0);
\draw[color=gray] (3_0) -- (4_0);
\path (-1.,-1.,1.) node(0_0) [] {};
\end{tikzpicture}
\end{document}
tetrahedron orientation -6
\documentclass[tikz]{standalone}

\usepackage{pgflibraryshapes}
\usetikzlibrary{backgrounds}
\usetikzlibrary{arrows}
\begin{document}
\begin{tikzpicture}[scale = 0.5,font=\fontsize{8}{8}\selectfont]
\path (-2.,-2.,2.) node(1_0) [draw,shape=circle,color=gray] {1};
\path (-2.,-2.,-2.) node(2_0) [draw,shape=circle,color=gray] {2};
\path (-2.,2.,2.) node(3_0) [draw,shape=circle,color=gray] {3};
\path (2.,-2.,2.) node(4_0) [draw,shape=circle,color=gray] {4};
\draw[color=gray] (1_0) -- (2_0);
\draw[color=gray] (2_0) -- (3_0);
\draw[color=gray] (3_0) -- (1_0);
\draw[color=gray] (1_0) -- (4_0);
\draw[color=gray] (4_0) -- (2_0);
\draw[color=gray] (3_0) -- (4_0);
\path (-1.,-1.,1.) node(0_0) [] {};
\end{tikzpicture}
\end{document}
tetrahedron orientation -5
\documentclass[tikz]{standalone}

\usepackage{pgflibraryshapes}
\usetikzlibrary{backgrounds}
\usetikzlibrary{arrows}
\begin{document}
\begin{tikzpicture}[scale = 0.5,font=\fontsize{8}{8}\selectfont]
\path (2.,-2.,2.) node(1_0) [draw,shape=circle,color=gray] {1};
\path (-2.,-2.,2.) node(2_0) [draw,shape=circle,color=gray] {2};
\path (-2.,2.,2.) node(3_0) [draw,shape=circle,color=gray] {3};
\path (-2.,-2.,-2.) node(4_0) [draw,shape=circle,color=gray] {4};
\draw[color=gray] (1_0) -- (2_0);
\draw[color=gray] (2_0) -- (3_0);
\draw[color=gray] (3_0) -- (1_0);
\draw[color=gray] (1_0) -- (4_0);
\draw[color=gray] (4_0) -- (2_0);
\draw[color=gray] (3_0) -- (4_0);
\path (-1.,-1.,1.) node(0_0) [] {};
\end{tikzpicture}
\end{document}
tetrahedron orientation -4
\documentclass[tikz]{standalone}

\usepackage{pgflibraryshapes}
\usetikzlibrary{backgrounds}
\usetikzlibrary{arrows}
\begin{document}
\begin{tikzpicture}[scale = 0.5,font=\fontsize{8}{8}\selectfont]
\path (-2.,-2.,-2.) node(1_0) [draw,shape=circle,color=gray] {1};
\path (2.,-2.,2.) node(2_0) [draw,shape=circle,color=gray] {2};
\path (-2.,2.,2.) node(3_0) [draw,shape=circle,color=gray] {3};
\path (-2.,-2.,2.) node(4_0) [draw,shape=circle,color=gray] {4};
\draw[color=gray] (1_0) -- (2_0);
\draw[color=gray] (2_0) -- (3_0);
\draw[color=gray] (3_0) -- (1_0);
\draw[color=gray] (1_0) -- (4_0);
\draw[color=gray] (4_0) -- (2_0);
\draw[color=gray] (3_0) -- (4_0);
\path (-1.,-1.,1.) node(0_0) [] {};
\end{tikzpicture}
\end{document}
tetrahedron orientation -3
\documentclass[tikz]{standalone}

\usepackage{pgflibraryshapes}
\usetikzlibrary{backgrounds}
\usetikzlibrary{arrows}
\begin{document}
\begin{tikzpicture}[scale = 0.5,font=\fontsize{8}{8}\selectfont]
\path (-2.,-2.,-2.) node(1_0) [draw,shape=circle,color=gray] {1};
\path (-2.,-2.,2.) node(2_0) [draw,shape=circle,color=gray] {2};
\path (2.,-2.,2.) node(3_0) [draw,shape=circle,color=gray] {3};
\path (-2.,2.,2.) node(4_0) [draw,shape=circle,color=gray] {4};
\draw[color=gray] (1_0) -- (2_0);
\draw[color=gray] (2_0) -- (3_0);
\draw[color=gray] (3_0) -- (1_0);
\draw[color=gray] (1_0) -- (4_0);
\draw[color=gray] (4_0) -- (2_0);
\draw[color=gray] (3_0) -- (4_0);
\path (-1.,-1.,1.) node(0_0) [] {};
\end{tikzpicture}
\end{document}
tetrahedron orientation -2
\documentclass[tikz]{standalone}

\usepackage{pgflibraryshapes}
\usetikzlibrary{backgrounds}
\usetikzlibrary{arrows}
\begin{document}
\begin{tikzpicture}[scale = 0.5,font=\fontsize{8}{8}\selectfont]
\path (-2.,-2.,2.) node(1_0) [draw,shape=circle,color=gray] {1};
\path (2.,-2.,2.) node(2_0) [draw,shape=circle,color=gray] {2};
\path (-2.,-2.,-2.) node(3_0) [draw,shape=circle,color=gray] {3};
\path (-2.,2.,2.) node(4_0) [draw,shape=circle,color=gray] {4};
\draw[color=gray] (1_0) -- (2_0);
\draw[color=gray] (2_0) -- (3_0);
\draw[color=gray] (3_0) -- (1_0);
\draw[color=gray] (1_0) -- (4_0);
\draw[color=gray] (4_0) -- (2_0);
\draw[color=gray] (3_0) -- (4_0);
\path (-1.,-1.,1.) node(0_0) [] {};
\end{tikzpicture}
\end{document}
tetrahedron orientation -1
\documentclass[tikz]{standalone}

\usepackage{pgflibraryshapes}
\usetikzlibrary{backgrounds}
\usetikzlibrary{arrows}
\begin{document}
\begin{tikzpicture}[scale = 0.5,font=\fontsize{8}{8}\selectfont]
\path (2.,-2.,2.) node(1_0) [draw,shape=circle,color=gray] {1};
\path (-2.,-2.,-2.) node(2_0) [draw,shape=circle,color=gray] {2};
\path (-2.,-2.,2.) node(3_0) [draw,shape=circle,color=gray] {3};
\path (-2.,2.,2.) node(4_0) [draw,shape=circle,color=gray] {4};
\draw[color=gray] (1_0) -- (2_0);
\draw[color=gray] (2_0) -- (3_0);
\draw[color=gray] (3_0) -- (1_0);
\draw[color=gray] (1_0) -- (4_0);
\draw[color=gray] (4_0) -- (2_0);
\draw[color=gray] (3_0) -- (4_0);
\path (-1.,-1.,1.) node(0_0) [] {};
\end{tikzpicture}
\end{document}
tetrahedron orientation 0
\documentclass[tikz]{standalone}

\usepackage{pgflibraryshapes}
\usetikzlibrary{backgrounds}
\usetikzlibrary{arrows}
\begin{document}
\begin{tikzpicture}[scale = 0.5,font=\fontsize{8}{8}\selectfont]
\path (-2.,-2.,2.) node(1_0) [draw,shape=circle,color=gray] {1};
\path (-2.,-2.,-2.) node(2_0) [draw,shape=circle,color=gray] {2};
\path (2.,-2.,2.) node(3_0) [draw,shape=circle,color=gray] {3};
\path (-2.,2.,2.) node(4_0) [draw,shape=circle,color=gray] {4};
\draw[color=gray] (1_0) -- (2_0);
\draw[color=gray] (2_0) -- (3_0);
\draw[color=gray] (3_0) -- (1_0);
\draw[color=gray] (1_0) -- (4_0);
\draw[color=gray] (4_0) -- (2_0);
\draw[color=gray] (3_0) -- (4_0);
\path (-1.,-1.,1.) node(0_0) [] {};
\end{tikzpicture}
\end{document}
tetrahedron orientation 1
\documentclass[tikz]{standalone}

\usepackage{pgflibraryshapes}
\usetikzlibrary{backgrounds}
\usetikzlibrary{arrows}
\begin{document}
\begin{tikzpicture}[scale = 0.5,font=\fontsize{8}{8}\selectfont]
\path (2.,-2.,2.) node(1_0) [draw,shape=circle,color=gray] {1};
\path (-2.,-2.,2.) node(2_0) [draw,shape=circle,color=gray] {2};
\path (-2.,-2.,-2.) node(3_0) [draw,shape=circle,color=gray] {3};
\path (-2.,2.,2.) node(4_0) [draw,shape=circle,color=gray] {4};
\draw[color=gray] (1_0) -- (2_0);
\draw[color=gray] (2_0) -- (3_0);
\draw[color=gray] (3_0) -- (1_0);
\draw[color=gray] (1_0) -- (4_0);
\draw[color=gray] (4_0) -- (2_0);
\draw[color=gray] (3_0) -- (4_0);
\path (-1.,-1.,1.) node(0_0) [] {};
\end{tikzpicture}
\end{document}
tetrahedron orientation 2
\documentclass[tikz]{standalone}

\usepackage{pgflibraryshapes}
\usetikzlibrary{backgrounds}
\usetikzlibrary{arrows}
\begin{document}
\begin{tikzpicture}[scale = 0.5,font=\fontsize{8}{8}\selectfont]
\path (-2.,-2.,-2.) node(1_0) [draw,shape=circle,color=gray] {1};
\path (2.,-2.,2.) node(2_0) [draw,shape=circle,color=gray] {2};
\path (-2.,-2.,2.) node(3_0) [draw,shape=circle,color=gray] {3};
\path (-2.,2.,2.) node(4_0) [draw,shape=circle,color=gray] {4};
\draw[color=gray] (1_0) -- (2_0);
\draw[color=gray] (2_0) -- (3_0);
\draw[color=gray] (3_0) -- (1_0);
\draw[color=gray] (1_0) -- (4_0);
\draw[color=gray] (4_0) -- (2_0);
\draw[color=gray] (3_0) -- (4_0);
\path (-1.,-1.,1.) node(0_0) [] {};
\end{tikzpicture}
\end{document}
tetrahedron orientation 3
\documentclass[tikz]{standalone}

\usepackage{pgflibraryshapes}
\usetikzlibrary{backgrounds}
\usetikzlibrary{arrows}
\begin{document}
\begin{tikzpicture}[scale = 0.5,font=\fontsize{8}{8}\selectfont]
\path (-2.,-2.,-2.) node(1_0) [draw,shape=circle,color=gray] {1};
\path (-2.,-2.,2.) node(2_0) [draw,shape=circle,color=gray] {2};
\path (-2.,2.,2.) node(3_0) [draw,shape=circle,color=gray] {3};
\path (2.,-2.,2.) node(4_0) [draw,shape=circle,color=gray] {4};
\draw[color=gray] (1_0) -- (2_0);
\draw[color=gray] (2_0) -- (3_0);
\draw[color=gray] (3_0) -- (1_0);
\draw[color=gray] (1_0) -- (4_0);
\draw[color=gray] (4_0) -- (2_0);
\draw[color=gray] (3_0) -- (4_0);
\path (-1.,-1.,1.) node(0_0) [] {};
\end{tikzpicture}
\end{document}
tetrahedron orientation 4
\documentclass[tikz]{standalone}

\usepackage{pgflibraryshapes}
\usetikzlibrary{backgrounds}
\usetikzlibrary{arrows}
\begin{document}
\begin{tikzpicture}[scale = 0.5,font=\fontsize{8}{8}\selectfont]
\path (-2.,-2.,2.) node(1_0) [draw,shape=circle,color=gray] {1};
\path (2.,-2.,2.) node(2_0) [draw,shape=circle,color=gray] {2};
\path (-2.,2.,2.) node(3_0) [draw,shape=circle,color=gray] {3};
\path (-2.,-2.,-2.) node(4_0) [draw,shape=circle,color=gray] {4};
\draw[color=gray] (1_0) -- (2_0);
\draw[color=gray] (2_0) -- (3_0);
\draw[color=gray] (3_0) -- (1_0);
\draw[color=gray] (1_0) -- (4_0);
\draw[color=gray] (4_0) -- (2_0);
\draw[color=gray] (3_0) -- (4_0);
\path (-1.,-1.,1.) node(0_0) [] {};
\end{tikzpicture}
\end{document}
tetrahedron orientation 5
\documentclass[tikz]{standalone}

\usepackage{pgflibraryshapes}
\usetikzlibrary{backgrounds}
\usetikzlibrary{arrows}
\begin{document}
\begin{tikzpicture}[scale = 0.5,font=\fontsize{8}{8}\selectfont]
\path (2.,-2.,2.) node(1_0) [draw,shape=circle,color=gray] {1};
\path (-2.,-2.,-2.) node(2_0) [draw,shape=circle,color=gray] {2};
\path (-2.,2.,2.) node(3_0) [draw,shape=circle,color=gray] {3};
\path (-2.,-2.,2.) node(4_0) [draw,shape=circle,color=gray] {4};
\draw[color=gray] (1_0) -- (2_0);
\draw[color=gray] (2_0) -- (3_0);
\draw[color=gray] (3_0) -- (1_0);
\draw[color=gray] (1_0) -- (4_0);
\draw[color=gray] (4_0) -- (2_0);
\draw[color=gray] (3_0) -- (4_0);
\path (-1.,-1.,1.) node(0_0) [] {};
\end{tikzpicture}
\end{document}
tetrahedron orientation 6
\documentclass[tikz]{standalone}

\usepackage{pgflibraryshapes}
\usetikzlibrary{backgrounds}
\usetikzlibrary{arrows}
\begin{document}
\begin{tikzpicture}[scale = 0.5,font=\fontsize{8}{8}\selectfont]
\path (2.,-2.,2.) node(1_0) [draw,shape=circle,color=gray] {1};
\path (-2.,2.,2.) node(2_0) [draw,shape=circle,color=gray] {2};
\path (-2.,-2.,2.) node(3_0) [draw,shape=circle,color=gray] {3};
\path (-2.,-2.,-2.) node(4_0) [draw,shape=circle,color=gray] {4};
\draw[color=gray] (1_0) -- (2_0);
\draw[color=gray] (2_0) -- (3_0);
\draw[color=gray] (3_0) -- (1_0);
\draw[color=gray] (1_0) -- (4_0);
\draw[color=gray] (4_0) -- (2_0);
\draw[color=gray] (3_0) -- (4_0);
\path (-1.,-1.,1.) node(0_0) [] {};
\end{tikzpicture}
\end{document}
tetrahedron orientation 7
\documentclass[tikz]{standalone}

\usepackage{pgflibraryshapes}
\usetikzlibrary{backgrounds}
\usetikzlibrary{arrows}
\begin{document}
\begin{tikzpicture}[scale = 0.5,font=\fontsize{8}{8}\selectfont]
\path (-2.,-2.,-2.) node(1_0) [draw,shape=circle,color=gray] {1};
\path (-2.,2.,2.) node(2_0) [draw,shape=circle,color=gray] {2};
\path (2.,-2.,2.) node(3_0) [draw,shape=circle,color=gray] {3};
\path (-2.,-2.,2.) node(4_0) [draw,shape=circle,color=gray] {4};
\draw[color=gray] (1_0) -- (2_0);
\draw[color=gray] (2_0) -- (3_0);
\draw[color=gray] (3_0) -- (1_0);
\draw[color=gray] (1_0) -- (4_0);
\draw[color=gray] (4_0) -- (2_0);
\draw[color=gray] (3_0) -- (4_0);
\path (-1.,-1.,1.) node(0_0) [] {};
\end{tikzpicture}
\end{document}
tetrahedron orientation 8
\documentclass[tikz]{standalone}

\usepackage{pgflibraryshapes}
\usetikzlibrary{backgrounds}
\usetikzlibrary{arrows}
\begin{document}
\begin{tikzpicture}[scale = 0.5,font=\fontsize{8}{8}\selectfont]
\path (-2.,-2.,2.) node(1_0) [draw,shape=circle,color=gray] {1};
\path (-2.,2.,2.) node(2_0) [draw,shape=circle,color=gray] {2};
\path (-2.,-2.,-2.) node(3_0) [draw,shape=circle,color=gray] {3};
\path (2.,-2.,2.) node(4_0) [draw,shape=circle,color=gray] {4};
\draw[color=gray] (1_0) -- (2_0);
\draw[color=gray] (2_0) -- (3_0);
\draw[color=gray] (3_0) -- (1_0);
\draw[color=gray] (1_0) -- (4_0);
\draw[color=gray] (4_0) -- (2_0);
\draw[color=gray] (3_0) -- (4_0);
\path (-1.,-1.,1.) node(0_0) [] {};
\end{tikzpicture}
\end{document}
tetrahedron orientation 9
\documentclass[tikz]{standalone}

\usepackage{pgflibraryshapes}
\usetikzlibrary{backgrounds}
\usetikzlibrary{arrows}
\begin{document}
\begin{tikzpicture}[scale = 0.5,font=\fontsize{8}{8}\selectfont]
\path (-2.,2.,2.) node(1_0) [draw,shape=circle,color=gray] {1};
\path (2.,-2.,2.) node(2_0) [draw,shape=circle,color=gray] {2};
\path (-2.,-2.,-2.) node(3_0) [draw,shape=circle,color=gray] {3};
\path (-2.,-2.,2.) node(4_0) [draw,shape=circle,color=gray] {4};
\draw[color=gray] (1_0) -- (2_0);
\draw[color=gray] (2_0) -- (3_0);
\draw[color=gray] (3_0) -- (1_0);
\draw[color=gray] (1_0) -- (4_0);
\draw[color=gray] (4_0) -- (2_0);
\draw[color=gray] (3_0) -- (4_0);
\path (-1.,-1.,1.) node(0_0) [] {};
\end{tikzpicture}
\end{document}
tetrahedron orientation 10
\documentclass[tikz]{standalone}

\usepackage{pgflibraryshapes}
\usetikzlibrary{backgrounds}
\usetikzlibrary{arrows}
\begin{document}
\begin{tikzpicture}[scale = 0.5,font=\fontsize{8}{8}\selectfont]
\path (-2.,2.,2.) node(1_0) [draw,shape=circle,color=gray] {1};
\path (-2.,-2.,-2.) node(2_0) [draw,shape=circle,color=gray] {2};
\path (-2.,-2.,2.) node(3_0) [draw,shape=circle,color=gray] {3};
\path (2.,-2.,2.) node(4_0) [draw,shape=circle,color=gray] {4};
\draw[color=gray] (1_0) -- (2_0);
\draw[color=gray] (2_0) -- (3_0);
\draw[color=gray] (3_0) -- (1_0);
\draw[color=gray] (1_0) -- (4_0);
\draw[color=gray] (4_0) -- (2_0);
\draw[color=gray] (3_0) -- (4_0);
\path (-1.,-1.,1.) node(0_0) [] {};
\end{tikzpicture}
\end{document}
tetrahedron orientation 11
\documentclass[tikz]{standalone}

\usepackage{pgflibraryshapes}
\usetikzlibrary{backgrounds}
\usetikzlibrary{arrows}
\begin{document}
\begin{tikzpicture}[scale = 0.5,font=\fontsize{8}{8}\selectfont]
\path (-2.,2.,2.) node(1_0) [draw,shape=circle,color=gray] {1};
\path (-2.,-2.,2.) node(2_0) [draw,shape=circle,color=gray] {2};
\path (2.,-2.,2.) node(3_0) [draw,shape=circle,color=gray] {3};
\path (-2.,-2.,-2.) node(4_0) [draw,shape=circle,color=gray] {4};
\draw[color=gray] (1_0) -- (2_0);
\draw[color=gray] (2_0) -- (3_0);
\draw[color=gray] (3_0) -- (1_0);
\draw[color=gray] (1_0) -- (4_0);
\draw[color=gray] (4_0) -- (2_0);
\draw[color=gray] (3_0) -- (4_0);
\path (-1.,-1.,1.) node(0_0) [] {};
\end{tikzpicture}
\end{document}