Compose a piece using the specified musical pattern based on the alphabet and the provided melodic theme.
X:1
L:1/8
M:4/4
K:D
['FD D2 FGAd', 'fdcd ABcd']  
X:1
L:1/8
M:4/4
K:D
|: G | FD D2 FGAd | cded BEEG | FD D2 FGAd | cdAG FDD :| e | fdcd ABcd | efgf eEEg | fdcd ABcd | 
 egfe dDDe | fdcd ABcd | efgf eEEG | FD D2 FGAd | cdAG FDD ||  