Compose tunes based on the given letter-based musical structure and the supplied motif.
X:1
L:1/16
Q:1/4=120
M:2/4
K:G
['G2D2G2A2 B2>A2 G4 d2ef g2d2 dedc B4', 'e2ed cBcA d4 GABc d2g2 B2A2']  
X:1
L:1/16
Q:1/4=120
M:2/4
K:G
 G2D2G2A2 | B2>A2 G4 | d2ef g2d2 | dedc B4 ::[M:6/8] d2dd e2ed | cBcA d4 | GABc d2g2 | B2A2 G4 :|  