Formulate a musical piece by utilizing the specified motif and alphabet-based structure.
X:1
L:1/8
Q:1/8=160
M:4/4
K:G
['(3GFG DG BGBd (3cBc AB cdef', 'G2 (3GBd g2 dB GBdg e2 cA']  
X:1
L:1/8
Q:1/8=160
M:4/4
K:G
 (BA) | (3GFG DG BGBd | (3cBc AB cdef | g2 df ecAG | FGAB cAFD | (3GFG DG BGBd | (3cBc AB cdef | 
 gdBG FAdc | B2 G2 G2 :: (3GBd | g2 dB GBdg | e2 cA FGAg | f2 e>d ^cdeg | (3fgf (3efe dcBA | 
 (3GFG DG BGBd | (3cBc AB cdef | gdBG FAdc | B2 G2 G2 :|  