Form a musical piece based on the provided motif while observing the defined structure.
X:1
L:1/8
M:4/4
K:G
['G3 B d z', 'd g3'  
X:1
L:1/8
M:4/4
K:G
|: G3 B d z BA | BcBA BcBA | G3 B d z BG | FADA FADA | G2 GB d2 (3Bcd | eBBd g3 z | efde Bddf | 
 e2 dB BAAB :: d g3 a z ge | d2 BA GB B2 | d g3 a z ge | d2 BG FA A2 | d g3 abge | dBBd g z fg | 
 efde Bddf | e2 dB BAAB :|  