Compose a piece of music using the specified alphabetical notation system and the provided theme.
X:1
L:1/8
Q:1/2=80
M:2/2
K:G
['B>cde dBcA', 'ccBB eedd', 'bagf edcB BGdB', '[B,D]2 [B,D]2 [CE]2 [CE]2 cedB', 'B2 A', '(ge).c b2 a gaf', 'd3 BGE c3 AFD B2 A']  
X:1
L:1/8
Q:1/2=80
M:2/2
K:G
 B>cde dBcA | GGBG AGAB | B>cde dBcA | GGAB G2 G,2 :: ccBB eedd | ggbg agab | ccBB eedd | 
 ggaf g2 g2 :: bagf edcB | BGdB AGAB | bagf edcB | BGdB G2 G,2 :: [B,D]2 [B,D]2 [CE]2 [CE]2 | 
 cedB AGAB | [B,D]2 [B,D]2 [CE]2 [CE]2 | cedB G2 G,2 :|[M:6/8][K:F][Q:3/8=120] (cA).F | f2 c B2 A | 
 GAB AcF | B2 A G2 F | GAF GEC | f2 c B2 A | GAB (A/B/c).F | B2 A GFE | F3 :: (ge).c | b2 a gaf | 
 edc (ge).c | b2 a gaf | f2 e cA.F | f2 c B2 A | d2 c f2 e | Bba gfe | f3 :: (cA).F | d3 BGE | 
 c3 AFD | B2 A GAF | GEC cAF | d3 BGE | c3 AFD | B2 A GFE | F3 :|  