Create a musical piece that integrates the provided motif and follows the prescribed alphabetical structure.
X:1
L:1/8
M:4/4
K:Bb
['f2 dB g2 gb', 'B4 d2 dB cAGF f2 fd ecBA', 'B2 B>A BFDB,', 'BdB cAG FED G3 BdB A3 D3', 'afc B3 B2 d e3 ecA F3']  
X:1
L:1/8
M:4/4
K:Bb
|: f2 dB g2 gb | fdcB cAGF | f2 dB g2 gb | fdec B4 :: d2 dB cAGF | f2 fd ecBA | gfef gabg | 
 fdec B4 :: B2 B>A BFDB, | B2 B>A BFDB, | Bcde fgfe | dBcA B2 B,2 ::[M:6/8][K:G] G3 BdB | cAG FED | 
 G3 BdB | A3 D3 | G3 ABc | def gab | afd ge^c | d3 D3 :: a3 afc | B3 B2 d | e3 ecA | F3 F2 G | 
 ADA B2 c | def g2 c | BdB cAF | G3 [G,G]3 :|  