Compose a piece of music using the specified alphabetical notation system and the provided theme.
X:1
L:1/8
M:12/8
K:D
['', 'f3- f3-', 'cBA cBA']  
X:1
L:1/8
M:12/8
K:D
 AB cde |: f3- f3- fed dcB | A3- A3- A2 d ded | c3- c3- cba gba | f3- f3- fAB cBc | 
 f3- f3- fed dcB | A3- A3- A2 d ded | c3- c3- caa age |1 dAf dAf dAB gec :|2 dAf dAf d2 || a a2 b | 
 cBA cBA cBA GFE | DFA dDB A3- (A2 d) | cBA cBA cBA GFE | DFA DFB A3- A2 d | cBA cBA cBA GFE | 
 DFA dDB A3- (A2 d) | cBA cBA cBA GBc | DFA dAF D ||  