Create a musical composition employing the given alphabetic structure and melodic theme.
X:1
L:1/8
M:2/2
K:Amix
['ea a2', 'eA A2']  
X:1
L:1/8
M:2/2
K:Amix
 ea a2 eg g2 | ea a2 ABcd | ea a2 efge | afge d2 cd :: eA A2 efgf | eA A2 BAGB | ABcd efge | 
 afge d2 cd :|  