Develop a musical piece employing the provided motif and an alphabet-based structure.
X:1
L:1/8
M:4/4
K:G
['B2 G2 GBAG B2 F2 FBBd c3', 'fe d3 e d2 Bd G6 EF']  
X:1
L:1/8
M:4/4
K:G
 B2 G2 GBAG | B2 F2 FBBd | c3 B AGAB | B2 A2 A2 GA | B2 G2 GBAG | B2 F2 FBBd | c3 B AGAB |1 
 A6 GA :|2 A3 B ABcd |: eg e4 dc | eg e4 fe | d3 e d2 Bd | G6 EF | G2 G2 GEGA | B2 F2 F2 Bd | 
 c3 B AGAB |1 A3 B ABcd :|2 A6 GA |]  