Craft a musical composition by incorporating the provided motif and the alphabetical representation of the given sequence.
X:1
L:1/8
Q:1/2=80
M:2/2
K:G
['BgdB cBAG FGAc', '', "c'aaa gabc' d'bbb c'aaa bggg a2 d'2"]  
X:1
L:1/8
Q:1/2=80
M:2/2
K:G
 dc | B>GBd BgdB | cBAG FGAc | BGBd gc'ag | f2 d2 d2 dc | BGBd BgdB | cBAG FGAc | BdGB cBAG | 
 A2 G2 G2 :|"^*" z2 |: fgab c'aaa | gabc' d'bbb | c'aaa bggg | a2 d'2 d'2 dc | BGBd BgdB | 
 cBAG FGAc | BdGB cBAG | A2 G2 G2"^*" z2 :|  