Is it possible to apply a shading effect on one side of a polyline in TikZ? I have the following simple code
\begin{tikzpicture}
\draw (1.06,9.56) -- (1.44,9.78) -- (1.78,9.56) -- (2.14,9.79) -- (2.48,9.29)
-- (2.83,9.79) -- (3.17,9.54) -- (3.54,9.76) -- (3.87,9.56);
\draw (1.06,8.94) -- (1.44,8.72) -- (1.78,8.93) -- (2.14,8.71) -- (2.48,9.21)
-- (2.83,8.72) -- (3.17,8.96) -- (3.54,8.74) -- (3.87,8.94);
\end{tikzpicture}
I want some shading above the upper line and below the lower line, as the lines represent air-solid boundaries and I need to convey this graphically.