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
['d2 fd', 'B2 GB']  
X:1
L:1/8
M:4/4
K:D
 A | d2 fd ecAc | BGEB AFDA | d2 fd eagf | edcB A3 :: c | B2 GB A2 FA | G2 EG F2 DF | B2 GB AdcB | 
 AGFE D3 :|  