答案1
\documentclass[tikz,border=2mm]{standalone}
\begin{document}
\begin{tikzpicture}
\draw[clip] (0,0) circle (1.5cm);
\foreach \i/\j in {0/5mm,45/2mm,90/4mm,135/3mm,180/1mm,270/2mm}
\draw[line width=\j, gray] (\i:1.5) arc[start angle=\i, delta angle=45, radius=1.5cm];
\foreach \i in {0,45,...,360}
\draw (0,0) -- ++(\i:1.5);
\fill (25:5mm) circle (.5mm);
\end{tikzpicture}
\end{document}