Develop a musical piece employing the provided motif and an alphabet-based structure.
X:1
L:1/8
M:2/2
K:Bb
['c2 (3cde d2 B2', 'B4 B,2 B,2 C2 C2 FGFE D2', 'B4 bagf edcB ABcA B2 F2 c2']  
X:1
L:1/8
M:2/2
K:Bb
 c2 (3cde d2 B2 | ABcA B2 F2 | c2 (3cde d2 B2 | ABcA B4 :: B,2 B,2 C2 C2 | FGFE D2 B,2 | 
 c2 (3cde d2 B2 | ABcA B4 :: bagf edcB | ABcA B2 F2 | c2 (3cde d2 B2 | ABcA B4 :|  