Create a musical composition using the given alphabetical pattern and melodic theme.
X:1
L:1/8
M:2/4
K:G
['GB B/c/B/A/', 'a>g fd', 'cA BB/A/ Bc dc A>g fd cA']  
X:1
L:1/8
M:2/4
K:G
|: GB B/c/B/A/ | GB B/c/B/A/ | FA AB/A/ | FA DA | GB B/c/B/A/ | GB d>g | fd cA |1 G2 G2 :|2 
 G2 G/B/d |: g>f gf | ga a>g | fd de | fg af | g>f gf | gb a>g | fd cA |1 G2 G/B/d :|2 G2 GA |: 
 B2 Bc | dc AG | FF/E/ FG | AB cA | BB/A/ Bc | dc A>g | fd cA |1 G2 GA :|2 G2 G2 ||  