Compose tunes based on the given letter-based musical structure and the supplied motif.
X:1
L:1/8
M:3/4
K:D
['G2 FE F2', 'c6 F3 GAF GDB,A, B,2 ^G3 ABG']  
X:1
L:1/8
M:3/4
K:D
 f4 dF | G2 FE F2 | F4 DF | G2 FE F2 | AGABcA | C2 e4 | df e2 d2 | c6 :: F3 GAF | GDB,A, B,2 | 
 ^G3 ABG | AECB, C2 | c3 edc | dA FE F2 | (3GFE D2 E2 | F6 :|  