Develop a musical piece incorporating the designated alphabet-based pattern and the supplied melodic theme.
X:1
L:1/8
Q:1/8=130
M:4/4
K:D
['Adcd ef c2 d2', 'd2 ga ag/f/ gg g2 fg/f/ ed']  
X:1
L:1/8
Q:1/8=130
M:4/4
K:D
 Adcd ef c2 | d2 e>g fd d2 | Adcd ef c2 | d2 eg fd d2 :: ga ag/f/ gg g2 | 
 fg/f/ ed cB"^or G in ms" A2 | ab/a/ ga/g/ fg/f/ e2 | d2 e>g fd d2 :|  