Develop a musical composition by integrating the alphabetically represented musical pattern and the supplied melodic theme.
X:1
L:1/8
M:6/8
K:Amix
['Acd e3 fed', 'agf efg gga gef ffg fed']  
X:1
L:1/8
M:6/8
K:Amix
|: Acd e3 | fed e3 | Acd e3 | fed BAG | Acd e3 | fed e3 | g3 fed | BAG A3 :| agf efg | gga gef | 
 ffg fed | e3 dcA | agf efg | gga gef | ffg fed | edc A3 | agf efg | gga gef | ffg fed | e3 dcA | 
 Acd e3 | fed e3 | g3 fed | BAG A3 ||  