Compose a piece using the specified musical pattern based on the alphabet and the provided melodic theme.
X:1
L:1/8
M:4/4
K:Amix
['', 'fe ef B2 BBfe dcBd d3 e', '', '(3(def) g3 g fe d2']  
X:1
L:1/8
M:4/4
K:Amix
 fe |: ef B2 BBfe | dcBd d3 e | dcBc c3 f | f2 f2 f fe | ef B2 BBfe | dcBd d3 e | dcBc c3 c | 
 BA AB B2 B2 B2 B :| (3(def) |: g3 g fe d2 | f2 (3(edB) B2 (3(def) | g3 g fe d2 | f3 f ed | 
 c2 c2 c2 c fe | ef B2 BBfe | dcBd d3 e | dcBc c3 c | BA AB B2 B2 :|  