Compose tunes based on the given letter-based musical structure and the supplied motif.
X:1
L:1/8
M:3/4
K:none
['B2 B2', 'G2 FG BA Bd c2 c2']  
X:1
L:1/8
M:3/4
K:none
[K:G]"G" B2 d2 e2 |"D7" d2 cF A2 | Fd cF AF |"G" Ge BG B2 | B2 d2 e2 |"D7" d2 cF A2 | Fd cA cf | 
"G" g2 g2 z2 ::"C" gf e2 e2 |"G" dc B2 B2 |"D7" cB Ac BA |"G" BA G4 |"C" gf e2 e2 |"G" dc B2 B2 | 
"D7" cB Ac BA |"G" G2 G2 z2 ::[K:C]"C" EG c2 G2 |"G7" FG B2 G2 | FG BG Bd |"C" e2 c2 c2 | 
 EG c2 G2 |"G7" FG B2 G2 | FG BA Bd |"C" c2 c2 z2 :|  