Formulate a musical piece by utilizing the specified motif and alphabet-based structure.
X:1
L:1/8
M:2/2
K:G
['DC B,CDB, G,B,DB, G,2 G2 G2 AG', 'G4 Bc dBGB dBGB ecAc ecAc fdAd']  
X:1
L:1/8
M:2/2
K:G
 DC | B,CDB, G,B,DB, | G,2 G2 G2 AG | FGAF DFAF | D2 d2 d2 cB | cdec BcdB | cdef g2 fa | 
 gdec dBAG | D2 G4 :: Bc | dBGB dBGB | ecAc ecAc | fdAd efge | f2 d2 d2 cB | cdec BcdB | 
 cdef g2 fa | gdec dBAG | D2 G4 :|  