Fuente TeX:

\framebox{ \begin{tikzpicture}   \draw[line width=0.3cm,color=red!30,cap=round,join=round] (3.12,0)--(3.88,0);   \draw[thick] (-1,0)--(6,0);    \draw[shift={(0,0)},color=darkgray,thin] (0pt,3pt) -- (0pt,-3pt) node[below] {$0$};    \draw[shift={(1,0)},color=darkgray,thin] (0pt,3pt) -- (0pt,-3pt) node[below] {$1$};    \draw[shift={(2,0)},color=darkgray,thin] (0pt,3pt) -- (0pt,-3pt) node[below] {$2$};    \draw[shift={(3,0)},color=darkgray,thin] (0pt,3pt) -- (0pt,-3pt) node[below] {$3$};    \draw[shift={(4,0)},color=darkgray,thin] (0pt,3pt) -- (0pt,-3pt) node[below] {$4$};    \draw[shift={(5,0)},color=darkgray,thin] (0pt,3pt) -- (0pt,-3pt) node[below] {$5$};    \draw[shift={(4,0)},color=black,very thick]  node {$]$};    \draw[shift={(3,0)},color=black,very thick]  node {$[$}; \end{tikzpicture} }