Utilize the alphabetic system of the specified musical pattern and the supplied melodic theme to create a piece of music.
X:1
L:1/8
M:4/4
K:D
['D2 FD ADFA DEFA defa ge e2']  
X:1
L:1/8
M:4/4
K:D
 D2 FD ADFA | DEFA defa | ge e2 efed | ca a2 ba^ga | fdde dAFd | BGGA Bdfa | Bggf e2 ed | 
 cdec d4 :|  