Compose a tune that integrates the letter-based representation of the determined musical pattern and the given melodic idea.
X:1
L:1/8
M:4/4
K:A
['ABcA B2', 'e2 cA']  
X:1
L:1/8
M:4/4
K:A
|: ABcA B2 cB | ABcA BAFE | ABcA B2 ce | f2 ec BAFE | ABcA B2 cB | ABcA BAFA | d2 dc dfed | 
 c2 B2 A4 :: e2 cA e2 cA | e2 cA BAFE | e2 ce fecB | ABcA BAFE | e2 cA e2 cA | e2 cA BAFA | 
 d2 dc dfed | c2 B2 A4 :|  