Compose a piece of music using the specified alphabetical notation system and the provided theme.
X:1
L:1/8
M:4/4
K:D
['D>D DEGA B2', 'd>d ded=c B2']  
X:1
L:1/8
M:4/4
K:D
 D>D DEGA B2 | AGEG BAB/d | D>D DEGA B2 | AGE=C (D2 D2) :| d>d ded=c B2 | AGEG BAB/d | 
 d>d ded=c B2 | AGE=C (D2 D2) :|  