Compose a piece of music following the given alphabetical representation of the musical structure and the provided motif.
X:1
L:1/8
Q:1/8=180
M:2/2
K:G
['G,B,DB, CB,A,B, CDEF', 'g2 dB']  
X:1
L:1/8
Q:1/8=180
M:2/2
K:G
 G2 DB, G,B,DB, | CB,A,B, CDEF | G2 DB, G,B,DF | Ggdc BcAF | GGDB, G,B,DB, | CB,A,B, CDEF | 
 GFGf (3gfe dc | (3Bcd Ac BG G2 || g2 dB GBdf | gbag fdef | g2 dB GBdB | cBAG FGAd | gedB GBdf | 
 gbag fgag |"^15" (3bag (3agf (3gfe dc | (3Bcd AG FDEF |]  