Develop a musical composition by integrating the alphabetically represented musical pattern and the supplied melodic theme.
X:1
L:1/8
Q:1/8=100
M:6/8
K:G
['DGG GAB cAG FGA', 'G2 d def g2 g =fed cA^F']  
X:1
L:1/8
Q:1/8=100
M:6/8
K:G
"^with spirit" G/F/ | DGG GAB | cAG FGA | BAB cAF | AGG G2 F | DGG GAB | cAG FGA | d/e/=fd cA^F | 
 AGG G2 || d | def g2 g | =fed cA^F | Ggf gag | =fdd d2 e | ^f/g/ag =fed | cd_B A=Bc | 
 d/e/=fd cA^F | AGG G2 |]  