Craft a musical piece that integrates the provided melodic theme and the corresponding alphabetical pattern.
X:1
L:1/8
M:6/8
K:D
['gbg faf fed']  
X:1
L:1/8
M:6/8
K:D
 f |"D" afd"G" edB |"D" dcd"A" AFA |"D" dcd"Em" ede |"D" fef"A7" efg |"D" afd"G" edB | 
"D" dcd"A" AFA |"D" dcd"A7" efg |"D" fdd d2 :: e |"D" faf"G" gbg |"D" faf fed |"D" fef"G" gfg | 
"D" afd"A7" e2 d |"D" faf"G" gbg |"D" faf fed |"D" fef"A7" ede |"D" fdd d2 :|  