Compose tunes based on the given letter-based musical structure and the supplied motif.
X:1
L:1/16
M:2/4
K:D
['', '(fg a2)(ab a2)(fa g2)(eg f2)df a2(ab a2)(fa', '(FG)A2 (FG)A2']  
X:1
L:1/16
M:2/4
K:D
 (fg |: a2)(ab a2)(fa | g2)(eg f2)df | a2(ab a2)(fa | g2)e=c d2>(f2 :: g2)f2 d2>=c2 | A2(BA G2)A2 | 
 F2(ED =C2)D2 | (FG)A2 (FG)A2 | F2(ED =C2)DE | (FG)A2 (FG)A2 | f2>e2 d2=c2 | d4 d4 :|  