Compose a musical piece using the designated musical pattern's alphabetic representation and the assigned melodic theme.
X:1
L:1/8
Q:3/8=120
M:6/8
K:Amix
['f ecA', 'ecA ecA']  
X:1
L:1/8
Q:3/8=120
M:6/8
K:Amix
 f | ecA def | ece c2 f | ecA e>dc | BcB d2 f | ecA def | ece c2 e | fgf edc | BcB d2 :: f | 
 ecA ecA | ecA d2 f | ecA edc | BcB d2 f | ecA ecA | ecA c2 e | fgf edc | BcB d2 :|  