Compose a piece of music using the specified alphabetical notation system and the provided theme.
X:1
L:1/8
M:2/4
K:D
['AD FD FA de/d/ cA', 'Ad de fg/f/ ed cA']  
X:1
L:1/8
M:2/4
K:D
 AD FD | FA de/d/ | cA AG | EF GF/G/ | AD FD | FA de/d/ | cA GE | ED D2 :: Ad de | fg/f/ ed | 
 cA AB | cd ec | Ad de | fg/f/ ed | cA GE | ED D2 :|  