Develop a musical composition using both the specified melodic theme and the alphabetical pattern naming.
X:1
L:1/8
M:4/4
K:G
['G2 DG B,DGB dGBd GBAG', 'FdAd DdFA dAFA BdGd BdGd (3BAG (3BAG', 'D EcEc DBDB c2 AF GFE_E DdBG']  
X:1
L:1/8
M:4/4
K:G
 BA | G2 DG B,DGB | dGBd GBAG | A2 FA DAFA | fed^c ed=cA | G2 DG B,DGB | dGBd GBAG | 
 (3EFG FG ABcd |1 (3fed cA G2 :|2[K:D] (3fec cA GA |: AG | FdAd FdAd | DdFA dAFA | BdGd BdGd | 
 (3BAG (3BAG gfed | ceAe ceAe | cA (3cBA gece | dcdf edce | d2 ce d2 ::[K:G] ef | g2 dg ecAF | 
 GdBG D3 D | EcEc DBDB | c2 AF GFE_E | DdBG EcAF | GdBG DGFG | (3EFG cA BAGB | ADFA G2 :|  