\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{patterns}
\begin{document}

\begin{tikzpicture}
\draw[pattern=dots] (0,0) circle (1cm);
\draw[pattern=fivepointed stars] (0,0) rectangle (3,1);
\end{tikzpicture}

\end{document}