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:Amix
['', 'e2 Ac', 'dBGB cAce', '', 'e2 Ac', 'dBGB cAce']  
X:1
L:1/8
M:4/4
K:Amix
 f |: e2 Ac ecAf | e2 Ac dBGf | e2 Ac eAcA | BB/B/cA dBGB :| cAce cAAB | cAce dBGB | cAce AAcA | 
 BBcA dBGB | cAce aAAB | cAce gGGB | cAce aAae | gage dBG | gafge fdec | dBcA dBG || f |: 
 e2 Ac ecAf | e2 Ac dBGf | e2 Ac eAcA | BB/B/cA dBGB :| cAce cAAB | cAce dBGB | cAce AAcA | 
 BBcA dBGB | cAce aAAB | cAce gGGB | cAce aAae | gage dBGg | cAce cAAB | cAce dBGB | cAce AAcA | 
 BBcA dBGB | cAce aAAB | cAce gGGB | afge fdec | dBcA dBG ||  