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
['a2 a>g f>g a2']  
X:1
L:1/8
M:4/4
K:D
|:"D" a2 a>g f>g a2 |"A7" e>f g>f e>f g2 |"D" a2 a>g f>g a2 | d>e f>d"A7" e2"D" d2 :: 
"D" f>d A>d f>d f2 |"A7" g>e c>e g>e g2 |"D" f>d A>d f>d f2 | d>e f>d"A7" e2"D" d2 :|  