Create a musical composition based on the alphabetic representation of the predetermined pattern and the given melodic theme.
X:1
L:1/8
M:4/4
K:D
['fg afge dfed ceAA ABAG', 'eAAA fdfd']  
X:1
L:1/8
M:4/4
K:D
 fg | afge dfed | ceAA ABAG | FA df gfed | ceAA A fg | afge dfed | ceAA ABAG | FAdf gedc | 
 d2 dd d2 :: cd | eAAA fdfd | eAAA fdfd | gfed dcBA | GBBB B2 AG | FAAA dcBA | cdef gedc | 
 dfaf bgec | d2 dd d2 :|  