Create a musical composition using the given alphabetical pattern and melodic theme.
X:1
L:1/16
M:2/4
K:G
['B,DGA BGDB, CEAB .c2vDC', 'bgfg egfg dgBg']  
X:1
L:1/16
M:2/4
K:G
 vDC | B,DGA BGDB, | CEAB .c2vDC | B,DGA BGcB | AGFE .D2vDC | B,DGA BGDB, | CEAB .c2vDC | 
 B,GFG ECA,B, | G,B,DG G,2 :: vga | bgfg egfg | dgBg dgBg | bgfg dgfg | eaag .a2(ga) | bgfg egfg | 
 dgBg dBGB | c"^4"eAc BdGB | AGFA G2 :|  