Craft a musical piece that integrates the provided melodic theme and the corresponding alphabetical pattern.
X:1
L:1/8
M:4/4
K:G
['GA (3Bcd c2', 'GA (3Bcd c2']  
X:1
L:1/8
M:4/4
K:G
 GA (3Bcd c2 dB | GA (3Bcd c2 Bc | dg (3fga gfdc | (3Bcd BG =FDCD | GA (3Bcd c2 dB | 
 GA (3Bcd c2 Bc | dgfd cAFA |1 G2 (3AGF GDEF :|2 G2 (3AGF G2 (3Bcd || gd (3Bcd =fc (3ABc | 
 gd (3Bcd f2 (3def | gb (3fga gfde | (3fga (3gfe fdcA | GA (3Bcd c2 dB | GA (3Bcd c2 Bc | 
 dgfd cAFA |1 G2 (3AGF G2 (3Bcd :|2 G2 (3AGF G4 ||  