Compose a piece of music using the specified alphabetical notation system and the provided theme.
X:1
L:1/4
M:3/4
K:D
['D, E,', 'A, A,,']  
X:1
L:1/4
M:3/4
K:D
 D, D,, z | F, D, E, | F, D, G, | F, E, D, | E, E,, C, | D, E, F, | C, E, D, | A, E, A,, :: 
 A, A,, z | A, A,, G, | F, E, D, | A, A,, F, | G, ^G, E, | A, C A, | D, A, A,, | D, A,, D,, :|  