Compose a piece using the alphabetic notation of the assigned musical structure and the provided melodic motif.
X:1
L:1/8
M:4/4
K:A
['GB z', 'e2 ce z c e2']  
X:1
L:1/8
M:4/4
K:A
 Aceg agfe | dcBA GB E2 | B2 GB z G B2 | cBAc BA GB | Aceg agfe | dcBA GB E2 | B2 GB z E GB | 
 z AGB A2 E2 :| (4:3:4A/B/c/d/ e2 ce z c e2 | B2 GB z G B2 | e2 ce z c e2 | f2 df z d f2 | 
 Aceg agae | fdBc A4 :|  