Compose a piece of music following the given alphabetical representation of the musical structure and the provided motif.
X:1
L:1/8
Q:1/4=160
M:2/4
K:Cmin
['', 'GG c2 c=B c2 c2 cd ed', 'GA B2 A2 |1 G4 :|2']  
X:1
L:1/8
Q:1/4=160
M:2/4
K:Cmin
 GG |: c2 c=B | c2 c2 | cd ed |1 c2 GG :|2 c2 z2 |: B2 (AG) | F2 GA | B2 A2 |1 G4 :|2 G2 ||  