Develop a musical composition using the alphabetic representation of the specified sequence and incorporating the given motif.
X:1
L:1/8
M:4/4
K:D
['Bg ed ce', 'd2 fg abaf df af ba gf']  
X:1
L:1/8
M:4/4
K:D
|: (3gfA | DA FD AF dA | Bg ed ce ag | fe dc Bg ed | ce Bc AF GE | DA FD AF dA | Bg ed ce ag | 
 fe dc Bg ec | d z dc d2 :: fg | abaf df af | ba gf eA ce | fg gA (3Bcd ef | ge fd eg fe | 
 d2 (3gfe dA FA | Bg ed ce ag | fA dA Bg ec | d z dc d2 :|  