Compose a piece using the alphabetic notation of the assigned musical structure and the provided melodic motif.
X:1
L:1/8
Q:1/4=120
M:4/4
K:G
['g2 bg', 'B/c/d BG']  
X:1
L:1/8
Q:1/4=120
M:4/4
K:G
 g2 bg afgd | g2 bg af g2 | g2 bg afgd | =fdcf AFcA :: B/c/d BG ecdB | B/c/d BG gB d2 | 
 B/c/d BG ecdB | cB=FA fA c2 :|  