Shading Badan Gitar

\shade[shading=ball,ball color=sunglow,blur shadow] (0,-6.89) .. controls (3,-7) and (3.5,-4.5) .. (2.25,-3)
.. controls (1.5,-2) and (1.8,-1.75) .. (1.88,-1.5)
.. controls (2.45,-.5) and (1.8,0) .. (1.45,.16)
.. controls (1,.35) and (.6,.32) .. (.42,.32)
-- (-.42,.32) .. controls (-.6,.32) and (-1,.35) .. (-1.45,.16)
.. controls (-1.8,0) and (-2.45,-.5) .. (-1.88,-1.5)
.. controls (-1.8,-1.75) and (-1.5,-2) .. (-2.25,-3)
.. controls (-3.5,-4.5) and (-3,-7) .. (0,-6.89) ;