Develop a musical piece incorporating the designated alphabet-based pattern and the supplied melodic theme.
X:1
L:1/8
M:4/4
K:Ddor
['EDCD EG (3GBG AGcG', 'ED D2', 'g efed cBcd e^fge ed d2 ec', '(3e^fg cg', 'ecdB cAGE']  
X:1
L:1/8
M:4/4
K:Ddor
|: EDCD EG (3GBG | AGcG AGcG | EDCD EG (3GBG | AGcG ED D2 :: e3 d cBcA | GE E2 GAcd |1 e2 ed cBcA | 
 GECD ED D2 :|2 eaag efed | cAGE ED D2 |: egg^f gedg | eaag a3 g | efed cBcd | e^fge ed d2 :: 
 ec (3ccc cAGE | GAcd ecGE | GAcd ecdB | cAGE ED D2 :: (3e^fg cg (3e^fg cg | (3f^ga da (3f^ga da | 
 (3e^fg cg (3e^fg cG | GAcd ed d2 | e2 a^f gefd | ecdB cAGE | GAcd ecdB | cAGE ED D2 :|  