Compose a piece of music that adheres to the specified alphabetical framework and includes the provided theme.
X:1
L:1/8
M:2/4
K:G
['GD GA Be e2 dB', 'gf ed Be e2 dB']  
X:1
L:1/8
M:2/4
K:G
|: B/A/ | GD GA | Be e2 | dB GA | BA AB/A/ | GD GA | Be e2 | dB AB/A/ | G2 G :| d | gf ed | Be e2 | 
 dB GA | BA A2 | gf ed | Be e2 | dB AB/A/ | G2 G :|  