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:6/8
K:D
['', 'dcd f2', 'dcd f2 a']  
X:1
L:1/8
M:6/8
K:D
 A |: dcd f2 d | edB A2 B | dcd f2 a | baf e2 a | dcd f2 d | edB A2 B | dea baf | e3 d3 :: 
 dcd f2 a | baf e2 a | dcd f2 a | b2 a a3 | dcd f2 a | baf e2 a | dea baf | e3 d3 :|  