\begin{tikzpicture}[inner sep=2mm, scale=.3, baseline=0]
	\draw (1,-2) arc(180:0:1.5);
	\draw (1.2,-2) arc(180:0:1.3);
	\draw (1.4,-2) arc(180:0:1.1);
	\draw (1.6,-2) arc(180:0:.9);
	\draw (1.8,-2) arc(180:0:.7);
	\draw (2,-2) arc(180:0:.5);

	\draw (1,2) arc(-180:0:1.5);
	\draw (1.2,2) arc(-180:0:1.3);
	\draw (1.4,2) arc(-180:0:1.1);
	\draw (1.6,2) arc(-180:0:.9);
	\draw (1.8,2) arc(-180:0:.7);
	\draw (2,2) arc(-180:0:.5);
\end{tikzpicture}