Craft a musical piece that integrates the provided melodic theme and the corresponding alphabetical pattern.
X:1
L:1/8
Q:1/4=120
M:2/4
K:D
['a/g/ fbea d>eff g/a/b/a/ g/f/e/d/ c/d/e/c/ A(a/g/)', 'd2 [df][df][df][df] [ce][ce][ce][ce] [Bg][Bg][Bg][Bg] [Af][Af][Af][Af] .[Bg](b/g/) (b/g/)(b/g/)']  
X:1
L:1/8
Q:1/4=120
M:2/4
K:D
 a/g/ | fbea | d>eff | g/a/b/a/ g/f/e/d/ | c/d/e/c/ A(a/g/) | fbea | d>efg | bgec | d2 d2 :: 
"^P" [df][df][df][df] | [ce][ce][ce][ce] | [Bg][Bg][Bg][Bg] | [Af][Af][Af][Af] | 
 .[Bg](b/g/) (b/g/)(b/g/) | .[Af](a/f/) (a/f/)(a/f/) | gedc | d2 D2 :|  