Compose tunes based on the given letter-based musical structure and the supplied motif.
X:1
L:1/8
M:3/4
K:C
['G GAGFED C2']  
X:1
L:1/8
M:3/4
K:C
 C | CEG/G/AGF | E2 z3 G | GAGFED | C2 z3 G | GA G2 z G | GAGFED | C2 z3 |]  