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:C
['d2 d c2 _B A2']  
X:1
L:1/8
M:6/8
K:C
 A | d2 A d2 e | f2 e d2 d | c2 _B A2 (3f/e/^c/ | d2 d c2 _B | A2 f e2 d | e2 f f2 e/d/ | 
 d2 ^c d2 x |]  