Develop a musical composition using both the specified melodic theme and the alphabetical pattern naming.
X:1
L:1/8
M:4/4
K:Amix
['Aeeg fdec Aeef gG B/c/d/B/ Aeeg fdef', 'B/c/d/B/ Ag f/g/a fdec Agf/g/a G/A/B dB']  
X:1
L:1/8
M:4/4
K:Amix
 Aeeg fdec | Aeef gG B/c/d/B/ | Aeeg fdef | gddg BG B/c/d/B/ :: Ag f/g/a fdec | Agf/g/a G/A/B dB | 
 Agf/g/a fdef | gddg | BG B/c/d/B/ :|  