Craft a musical composition by incorporating the provided motif and the alphabetical representation of the given sequence.
X:1
L:1/8
M:3/4
K:G
['A2 G2']  
X:1
L:1/8
M:3/4
K:G
 DED | B3 GAG | F2 z DED | c2 BA A2 | G2 z GFA | d2 cAGB | Bc/B/AGFA | d2 cA A2 | G2 z |]  