Compose tunes based on the given letter-based musical structure and the supplied motif.
X:1
L:1/8
Q:1/8=180
M:2/2
K:G
['BGGF GBAG D2 CD =FD D2 DGGF', 'dggf g2 ag']  
X:1
L:1/8
Q:1/8=180
M:2/2
K:G
 BGGF GBAG | D2 CD =FD D2 | DGGF GABc | dfe^c d2 =cA | BGGF GBAG | D2 CD =FD D2 | DGGF GABc | 
 dfe^c d2 || Bc | dggf g2 ag | fdde fdcA | dggf g2 ag | fgaf g4 | defg a3 g | fdd^c defg | 
 afge fde^c | d2 eg fdcA |"^last time" G8 |]  