Create a musical composition following the given alphabetical pattern and incorporating the provided motif.
X:1
L:1/8
M:6/8
K:G
['D G2 GAGA _B3 G2 G _B2']  
X:1
L:1/8
M:6/8
K:G
 D | G2 GAGA | _B3 G2 G | _B2 BcBc | d4 z d | g2 d_BAG | d3 A2 A | G2 _B A2 D | G4 z |]  