Create music using the given musical theme and adhere to the outlined letter-based structure.
X:1
L:1/8
M:2/2
K:G
['F G2 D>G B,G,G,B, CEDB, EAFD G2', 'BGBd g2']  
X:1
L:1/8
M:2/2
K:G
 F | G2 D>G B,G,G,B, | CEDB, EAFD | G2 DG B,G,G,c | EAFD (G2 G) :| c | BGBd g2 gf | edcB AGFD | 
 BGBd g2 gf | edce d2 dc | BGBd g2 (gf) | edcB AGFD | G2 DC B,CDc | BGAF (G2 G) ||  