Create a composition by utilizing the given alphabet-based musical pattern and the provided melodic theme.
X:1
L:1/8
M:4/4
K:A
['a2 eg a2', 'ceAe ceAe ceag fedc']  
X:1
L:1/8
M:4/4
K:A
 g | a2 eg a2 eg | a2 ea fedc | dfBf dfBf | dfba gefg | a2 eg a2 eg | a2 ea fedc | defe dcBA | 
 E2 G2 A2 :| e2 | ceAe ceAe | ceag fedc | dfBf dfBf | dfba gfed | ceAe ceAe | ceag fedc | 
 defd ecBA | E2 G2 A2 z :|  