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
['d2 fd', 'a2 ga']  
X:1
L:1/8
M:4/4
K:D
 d2 fd efde | fB B2 fece | d2 fd efdf | eA A2 eAce | d2 fd efde | fB B2 fece | defd efdf | 
 eA A2 eAce |: a2 ga faea | fB B2 fece | a2 ga fgaf |1 eA A2 eAce :|2 edef =g2 fe ||  