Craft a musical piece that integrates the provided melodic theme and the corresponding alphabetical pattern.
X:1
L:1/8
Q:1/8=300
M:4/4
K:D
['A2 d4 A3', 'd6 fg fedc dBcA d4 A2 Bc']  
X:1
L:1/8
Q:1/8=300
M:4/4
K:D
 AG | F2 D2 F2 A2 | d4 A3 d | BcdB AFED | E3 F E2 AG | FGAF D2 A2 | d4 A3 A | BcdB cdec | d6 :| 
 fg | fedc dBcA | d4 A2 Bc | dcBA BAGF | E3 F E2 fg | afge fdec | d4 A3 G | FAGB Ad c/d/e/c/ | 
 d6 :|  