Craft a musical piece that integrates the provided melodic theme and the corresponding alphabetical pattern.
X:1
L:1/8
M:2/2
K:G
['', 'gG G2 BAGE DEGA BGAB', 'c2 ec']  
X:1
L:1/8
M:2/2
K:G
 df |: gG G2 BAGE | DEGA BGAB | cA A2 ABAG | ABcd edef | gG G2 BAGE | DEGA BGAB | cBcd efge |1 
 dBAB G2 df :|2 dBAB G2 GA |: B2 dB eBdB | B2 dB eBdB | c2 ec fcec | c2 ec fedc | B2 dB eBdB | 
 B2 dB edcB | cBcd efge |1 dBAB G2 GA :|2 dBAB G2 ||  