Develop a musical composition using the alphabetic representation of the specified sequence and incorporating the given motif.
X:1
L:1/8
Q:3/8=100
M:6/8
K:Bb
['B2 b f2 b g2 b fdB', 'd2 f c2 f']  
X:1
L:1/8
Q:3/8=100
M:6/8
K:Bb
S B2 b f2 b | g2 b fdB | dBG{A} GFG | cAF FGA | B2 b f2 b | g2 b fdB | Ged cBA | B3!fine! B3 :: 
 d2 f c2 f | d2 f c2 f | =e2 g b2 a | gaf g=ec | f=ef agf | =efg GAB | Adc BAG | F3 FG!D.C.!AS |]  