Compose a piece of music using the provided motif and follow the designated alphabet character structure.
X:1
L:1/8
Q:1/4=160
M:4/4
K:G
['', 'FGAG ABcA F2 FE', 'BGAF G2']  
X:1
L:1/8
Q:1/4=160
M:4/4
K:G
 DB, |:"^A part" G,B,DG FGAG | ABcA F2 FE | DEFE DEFE | DCB,C D2 DB, | G,B,DG FGAG | ABcA F2 FE | 
 DEFG ABcA |1 BGAF G2 DB, :|2 BGAF G2 FG |:"^B part" ADDD BDDD | cDDD BDDD | ADBD cDBD | 
 (3cBA (3BAG F2 DB, | G,B,DG FGAG | ABcA F2 FE | DEFG ABcA |1 BGAF G2 FG :|2 BGAF G2 z2 |]  