Craft a musical composition by incorporating the provided motif and the alphabetical representation of the given sequence.
X:1
L:1/8
M:4/4
K:G
['GF E2']  
X:1
L:1/8
M:4/4
K:G
 GA | B2 GG G2 AB | A2 GF E2 FG | A4 z2 GA | B2 GG G2 AB | A2 GF E2 FG | AGFE D2 GF | E2 FE D2 |]  