Compose a musical piece using the specified sequence's alphabetical representation and the provided motif.
X:1
L:1/8
Q:1/8=208
M:3/8
K:C
['G2 G GAG FED']  
X:1
L:1/8
Q:1/8=208
M:3/8
K:C
 G2 G | GAG | FED | CFF | G2 G- | G2 z | G2 G | GAG | FED | F_ED | C2 C | CB,C | D2 B, | D2 B, | 
 DD_C | F_ED | C z2 |]  