Compose a tune that integrates the letter-based representation of the determined musical pattern and the given melodic idea.
X:1
L:1/8
Q:1/2=90
M:4/4
K:C
['aecA B2 df ecBA GBED CEAc', 'B2 Bc']  
X:1
L:1/8
Q:1/2=90
M:4/4
K:C
 C |[K:A]"^A Good Tune" aecA B2 df | ecBA GBED | CEAc EAce | aedc c2 B2 | aecA B2 df | ecBA GBED | 
 CEAc dBAG | A2 A2 A4 :: GBEd cAdc | B2 Bc B2 Bc | defg aecA | E2 EE E4 | cecA ecBA | fdbf agfe | 
 dBGE FAGB | A2 A2 A4 :|  