Develop a musical composition by integrating the alphabetically represented musical pattern and the supplied melodic theme.
X:1
L:1/4
M:2/2
K:D
['F A']  
X:1
L:1/4
M:2/2
K:D
 d/c/ |"D" d D F A |"G" B/A/B/c/"A" d e |"D" f/g/ a"G" B/c/ d |"Em7" e3/2 f/"A7" e c |"D" d D F A | 
"G" B/c/ d"A" c a/g/ |"D" f d"A7" e c |"D" d2- d :: f/g/ |"D" a f2 a |"Bm" f d2 e/f/ | 
"Em" g/f/e/d/ c d |"A7" e3 f/g/ |"D" a f d f |"D" A d F A |"A7" d3/2 e/ e3/2 d/ |"D" d3 :|  