Compose tunes based on the given letter-based musical structure and the supplied motif.
X:1
L:1/8
Q:1/8=280
M:6/8
K:D
['ecA d2', 'G F2']  
X:1
L:1/8
Q:1/8=280
M:6/8
K:D
 a3 g3 | fdf ecA | d2 f ecA | d2 e ecA | dcd ede | fef gfg | a2 G F2 E | D3 D3 :| D2 F E2 G | 
 F2 A G2 F | GAB ABc | B3 A3 | GFG AGA | BAB cBc | d2 G F2 E | D3 D3 :|  