Develop a musical composition by integrating the alphabetically represented musical pattern and the supplied melodic theme.
X:1
L:1/8
Q:3/8=100
M:6/8
K:F
['FGF cdc']  
X:1
L:1/8
Q:3/8=100
M:6/8
K:F
|:"^A" c/B/ |"F" A>GF"^/" FGF |"Dm" ABc"^/" cdc |"Gm" BAG"^/" GAG |"C7" Bcd"^/" ded | 
"F" AGF"^/" FGF |"Dm" ABc"^/" cdc |"C7" cBA"^/" GcB |"F" A2 G"^/" F2 ::"^B" e |"Dm" f>gf"^/" a2 f | 
"A7" e3-"^/" e2 a |"Dm" d>ed"^/" a2 d |"A" ^c3-"^/" c2 A |"G" =B^cd"A" cde |"Dm" def"Gm" efg | 
"Dm" fed"A7" Ad^c |"Dm" d2 D"^/" D2 :|  