Construct a musical piece that contains the provided motif and abides by the prescribed alphabetical scheme.
X:1
L:1/8
Q:1/8=180
M:4/4
K:G
['gdec BcBA', 'gdBd gdBd']  
X:1
L:1/8
Q:1/8=180
M:4/4
K:G
 (3d/e/f/ | gdec BcBA | GEDE G2 FE | DGBG DGBG | DGBG B2 df | gdec BcBA | GFED E2 Bd | efga bagf | 
 e4 g3 :| d | gdBd gdBd | gdBd gbag | fdAd fdAd | fdAd fagf | gfgd gbag | fe^de fagf | efga bagf | 
 e4 g3 :|  