testing
```tikz
\usepackage{tikz-3dplot}
\begin{document}
\tikzset{>=latex}
\tdplotsetmaincoords{70}{110}
\begin{tikzpicture}[tdplot_main_coords]
\draw[gray] (-3,0,0) -- (3,0,0);
\draw[gray] (0,-3,0) -- (0,3,0);
\draw[gray] (0,0,-1) -- (0,0,3);
\draw[blue,opacity=0.1,fill] (2.5,2.5,0) -- (-2.5,2.5,0)--(-2.5,-2.5,0)--(2.5,-2.5,0)--cycle;
\draw[thick,color=blue,->] (0,0,0) -- (2,2,0) node[anchor=north]{\(\vec v_1\)};
\draw[thick,color=blue,->] (0,0,0) -- (-2,2,0) node[anchor=north]{\(\vec v_2\)};
\draw[thick,color=blue,->] (0,0,0) -- (2,-2,0) node[anchor=north]{\(\vec v_3\)};
\draw[thick,color=black,->] (0,0,0) -- (0,1,2) node[anchor=west]{\(\vec v_4\)};
\draw[thick,color=black,->] (0,0,0) -- (1,0,2) node[anchor=east]{\(\vec v_5\)};
\draw[red,fill=red] (0,0,0) circle (.5ex) node[anchor=north]{\(\vec v_0\)};
\node[blue] at (-2.5,-2.5,0) {\(P\)};
\end{tikzpicture}
\end{document}
```
test
```tikz
\usepackage{tikz-3dplot}
\begin{document}
\tikzset{>=latex}
\tdplotsetmaincoords{70}{110}
\begin{tikzpicture}[tdplot_main_coords]
\draw[gray] (-3,0,0) -- (3,0,0);
\draw[gray] (0,-3,0) -- (0,3,0);
\draw[gray] (0,0,-1) -- (0,0,3.3);
\draw[thick,color=blue,->] (0,0,0) -- (2,2,0) node[anchor=north]{\(\vec v_1\)};
\draw[thick,color=blue,->] (0,0,0) -- (-2,2,0) node[anchor=north]{\(\vec v_2\)};
\draw[thick,color=blue,->] (0,0,0) -- (2,-2,0) node[anchor=north]{\(\vec v_3\)};
\draw[thick,color=black,->] (0,0,0) -- (0,1,2) node[anchor=west]{\(\vec v_4\)};
\draw[thick,color=black,->] (0,0,0) -- (1,0,2) node[anchor=east]{\(\vec v_5\)};
\draw[red,fill=red] (0,0,0) circle (.5ex) node[anchor=north]{\(\vec v_0\)};
\draw[red,opacity=0.1,fill] (2.5,2.5,2) -- (-2.5,2.5,2)--(-2.5,-2.5,2)--(2.5,-2.5,2)--cycle;
\node[red] at (-2.5,-2.5,2) {\(Q\)};
\end{tikzpicture}
\end{document}
```
sd