Construct a musical piece that contains the provided motif and abides by the prescribed alphabetical scheme.
X:1
L:1/8
M:6/8
K:G
['', '(d2 B)', 'gag (f2 g)']  
X:1
L:1/8
M:6/8
K:G
 D |: dcB (d2 B) | (d2 B) gfe | dcB (d2 B) | (c2 A) FED | dcB (d2 B) | (d2 B) gfe | dcB (c2 A) | 
 FEF G3 :: gag (f2 g) | efe dBG | gag (f2 g) | afd g3 | gag (f2 g) | efe dBG | ABA e2 e | dcA G3 :|  