Construct a musical composition following the given alphabetical structure and incorporating the specified motif.
X:1
L:1/8
Q:1/4=120
M:2/2
K:G
['g2 gf e2 dc c2 c2 B3', 'gfge a2 gf']  
X:1
L:1/8
Q:1/4=120
M:2/2
K:G
 g2 gf e2 dc | c2 c2 B3 c | d2 G2 c2 BA | A4 G4 :: gfge a2 gf | gfge a2 gf | gfge a2 gf | e4 d4 | 
 g2 gf e2 d2 | c2 c2 B3 c | d2 G2 c2 BA | A4 G4 :|  