Compose tunes based on the given letter-based musical structure and the supplied motif.
X:1
L:1/8
M:3/4
K:G
['G4 FE D4']  
X:1
L:1/8
M:3/4
K:G
 D | G4 AB | c B3 AA | G4 FE | D4 GA | B4 AB | c d3 GA | B4 AG | c4 Bc | d4 cB | c2 B2 A2 | G4 FE | 
 D4 B,C | D D3 EF | G A3 AB | C4 BA | B4 AG | G6 ||  