答案1
像这样?
带红色边框很简单......
\documentclass[12pt]{article}
\usepackage{tikz}
\usetikzlibrary{shapes}
\begin{document}
\begin{tikzpicture}[
stop/.style = {regular polygon, regular polygon sides=8,
draw=red, double, double distance=2mm, ultra thick,
fill=red, font=\Huge\bfseries, text=white,
inner sep=0mm, node contents={STOP}}
]
\node[stop];
\end{tikzpicture}
\end{document}