Incorporate the given motif and use the alphabetical representation of the specified musical sequence to compose a distinctive musical piece.
X:1
L:1/8
M:6/8
K:Bb
['', 'B dBF Bdg f2 f gfe dfd', '', 'Bdg |:[K:Eb] EGB eBe geg bgb/a/ f2', 'eBe geg bgb/a/ f2 g{b} agf', 'dBF Bdg', '']  
X:1
L:1/8
M:6/8
K:Bb
 F2 B |: dBF Bdg | f2 f gfe | dfd cdc |1 BdB F2 B :|2 B3 ||{cd} c=Bc |: f>cc f>cc |{f} a3 c'ba | 
 g>gg bag |1 faf c>cc :|2 f3 f'2 |:"^\"Refrain\"" F2 B | dBF Bdg | f2"^etc." |:[K:Eb] EGB eBe | 
 geg bgb/a/ | f2 g{b} agf | ede gec | BGB eBe | geg bgb/a/ | f2 g{b} agf | Bcd eBG :| 
[K:Bb]"^\"Refrain final\"" FzB | dBF Bdg | f2 f gfe | dfd cdc | BdB F2 B | dBF Bdg | fga bfd | 
 fec Bga | b3 ||  