Create a musical composition using the given alphabetical pattern and melodic theme.
X:1
L:1/8
Q:1/4=120
M:6/8
K:D
['D FG A AB =c BAB G2']  
X:1
L:1/8
Q:1/4=120
M:6/8
K:D
 D | FG A AB =c | BAB G2 z | F3 f a2 | f3 Azg | (fa) f (ed) c | (dc) B (AG) F | G B2 A f2{e} | 
 d3 D2 |]  