Compose tunes based on the given letter-based musical structure and the supplied motif.
X:1
L:1/16
M:2/4
K:G
['.B2GB .c2Ac .B2GB AFD2', 'AFD2 Bddg .e2dc']  
X:1
L:1/16
M:2/4
K:G
 dc | .B2GB .c2Ac | .B2GB AFD2 | .B2GB cedc | BGAF G2dc | .B2GB .c2Ac | .B2GB AFD2 | B2GB cedc |1 
 BGAF G2 :|2 BGAF G2 z2 |: Bddg .e2dc | BAGB AFD2 | Bddg .e2dc | BGAF G4 | BAGB AFD2 | 
 Bddg .e2dc |1 BGAF G2 z2 :|2 BGAF2 G2 ||  