Develop a musical piece employing the provided motif and an alphabet-based structure.
X:1
L:1/8
Q:3/8=100
M:6/8
K:G
['B2 d', 'G2 G ADA c2 A BGB dBG', 'gdB ecA']  
X:1
L:1/8
Q:3/8=100
M:6/8
K:G
 G | B2 d (BGB) | (A/B/c)A B2 d | B2 G (A/B/c)A | BcA G2 :: G | ADA c2 A | BGB dBG | ADA (A/B/c)A | 
 (B/c/d)B G2 :: d | B/c/dB gdB | ecA B2 d | (B/c/d)B gdB | ecA G2 :|  