Develop a musical composition by integrating the alphabetically represented musical pattern and the supplied melodic theme.
X:1
L:1/8
Q:1/8=35
M:3/8
K:G
['B/c/ dd/e/d bag gfe d2 B GG/A/G', 'bag gfe d2 B GG/A/G Aed |{d}']  
X:1
L:1/8
Q:1/8=35
M:3/8
K:G
 B/c/ | dd/e/d | bag | gfe | d2 B | GG/A/G | AA/B/A | BcB | A2 B/c/ | dd/e/d | bag | gfe | d2 B | 
 GG/A/G | Aed |{d} cBA |"^*" G2 :: dd/e/d | bag | gfe | d2 B | GG/A/G | Aed |{d} cBA |"^*" G2 :|  