Generate a musical piece using the presented motif and follow the alphabetical structure provided.
X:1
L:1/8
M:4/4
K:G
['BA Bc d2 cB']  
X:1
L:1/8
M:4/4
K:G
|: D2 |"G" G2 GA BG DB, |"C" C2 E2 E2 DC |"G" B,2 D2 G2 AB |"D7" cB AG FD EF |"G" G2 GA BG DB, | 
"C" C2 E2 E2 DC |"G" B,2 D2"D7" FD EF |"G" G2 G2 G2 :: A2 |"G" BA Bc d2 cB |"C" cB cd e2 dc | 
"G" BA Bc d2 cB |"D7" AG FE D2 GA |"G" BA Bc d2 cB |"C" cB cd e2 dc |"G" B2 Bc"D7" AF DF | 
"G" G2 G2 G2 :|  