Compose a piece of music that follows both the given musical theme and the letter-based structure provided.
X:1
L:1/8
M:2/4
K:G
["G2 Ac |{c} B2 ce dc'fa g/f/g/a/", '|{g} fd', 'd2 d2', '.d(dcB) .e(edc) BAGF G2 G2 (GB).d.g (Bd).g.b', 'd2 d2', '.e(edc) BAGF G2']  
X:1
L:1/8
M:2/4
K:G
|: G2 Ac |{c} B2 ce | dc'fa | g/f/g/a/ gg | GB/G/ Ac | Bd/B/ ce | d/c'/b/a/ gf | g2 g2 :: 
 bg/a/ b2 | c'a/b/ c'a | bg/a/ bg |{g} fd d2 | b(g/a/) bg | c'bag |{g} fd e/g/f/a/ | g2 g2 :: 
 fa/g/ fd | gb/a/ ge | fa^ce | d/^c/d/e/ dd |!p! (bg).g.b | (af).f.a |!f! ged^c | d2 d2 :: d2 cB | 
{cd} e2 dc | BAGF | G/F/G/A/ GG | .d(dcB) | .e(edc) | BAGF | G2 G2 :: (GB).d.g | (Bd).g.b | ac'fa | 
 g/f/g/a/ gg | (GB).d.g | (Bd).g.b | agfe | d2 d2 :: d2 cB |{cd} e2 dc | BAGF | G/F/G/A/ GG | 
 .d(dcB) | .e(edc) | BAGF | G2 G2 :|  