Develop a musical piece incorporating the designated alphabet-based pattern and the supplied melodic theme.
X:1
L:1/8
M:4/4
K:Ador
['cB ABcd efec dABG E2 G2', 'cd ec c2 Gcec dB B2 GBdB']  
X:1
L:1/8
M:4/4
K:Ador
|: cB | ABcd efec | dABG E2 G2 | ABcd efed | cAAG A2 cB | ABcd efec | dABG E2 G2 | ecdB cABG | 
 cAAG A2 :: cd | ec c2 Gcec | dB B2 GBdB | cAAG ABAG | E2 ED E2 cd | ec c2 Gcec | dB B2 GBdB |1 
 ABcd efed | cAAG A2 :|2 ecdB cABG | cAAG A2 ||  