Construct a musical work that combines the specified alphabet-based pattern with the given melodic theme.
X:1
L:1/8
M:2/2
K:G
['DGBG dGBG', 'DG G2 dGBG', 'fdcA BG G2', 'gbag fede fgaf |1 dggf gbag fdcA']  
X:1
L:1/8
M:2/2
K:G
 DGBG dGBG | DFAF cFAF | DGBG dGBG |1 BdcA BGAF :|2 BdcA BGBd |: g3 f gbag | f3 e fgaf |1 
 g2 gf gbag | fdcA BGBd :|2 defg abag | fdcA BGAF |:"^variations" DG G2 dGBG | DFAB cBAF | 
 DG G2 dGBG |1 BdAc BG G2 :|2 BdAc BGBd |: g3 f gbag | fdde fgaf |1 g2 gf gbag | fdcA BG G2 :|2 
 defg a3 g | fdcA BG G2 |:"^more variations" DGBG dGBG | DFAF BFAF | DGBG dGBG |1 BdcA BGAF :|2 
 BdcA G2 (3Bcd |: g2 gf gbag | fede fgaf |1 dggf gbag | fdcA BG (3Bcd :|2 gbag fagf | edcB AGFE ||  