Create a composition by utilizing the given alphabet-based musical pattern and the provided melodic theme.
X:1
L:1/8
M:6/8
K:D
['A, D2 D']  
X:1
L:1/8
M:6/8
K:D
 A, | D2 D B,CD | E2 E A,2 A, | D2 D E<DE | F3- F2 F | A2 F E<DE | F2 F/F/ B,2 B, | E2 E C<B,C | 
 (D3 D2) A, | D2 D E<DE | F3- F2 F | A2 F E<DE | F2 F/F/ B,2 B, | E2 E CA,C | D3- D2 z |]  