Create a musical composition based on the alphabetic representation of the predetermined pattern and the given melodic theme.
X:1
L:1/8
M:4/4
K:E
['', 'BcBG EF (3GFE', 'BEGB ^A=A^AB cF^Ac B2 (3BFD B,2 (3EDC']  
X:1
L:1/8
M:4/4
K:E
 (3EDC |: B,GG=G ^GFED | CAAG A2 GA | BcBG EF (3GFE | GFF=F ^F2 (3EDC | B,GGF GFED | 
 CAAG A2 (3GA^A | BcBG EF (3GFE |1 FECD E2 (3EDC :|2 FECD EGFE |: DEFG AGAF | GGGA BEGB | 
 ^A=A^AB cF^Ac | B2 (3BFD B,2 (3EDC | B,GG=G ^GFED | CAAG A2 (3GA^A | BcBG EF (3GFE |1 
 FECD EGFE :|2 (3FGA (3Bcd e2 ||  