Compose tunes based on the given letter-based musical structure and the supplied motif.
X:1
L:1/8
Q:1/8=160
M:6/8
K:G
['GAG AFA', 'AFA G2', 'G2 g', 'AFA def gdf efg G2 g efg']  
X:1
L:1/8
Q:1/8=160
M:6/8
K:G
 GAG G>BG | GAG AFA | G>GG G>GG | GcB AFA | GAG GBG | GAG AFA | G2 g gfe | dcB AFA || G2 d dAc | 
 BGB AFA | G2 d dAc | BcB AFA | G2 d dAc | BGB AFA | G2 g gfe | dcB AFA || G2 g gdc | BGB AFA | 
 G2 g gdc | BcB ecA | G2 g gdc | BGB AFA | G2 g gfe | dcB AFA || def gdf | efg G2 g | efg gd=f | 
 efg A2 g | geg =fdf | ece dBd | dcB gfe | dcB AFA ||  