Compose a tune that integrates the letter-based representation of the determined musical pattern and the given melodic idea.
X:1
L:1/4
M:4/4
K:Emin
['B A', 'c B A B/A/ G A2 A3/2']  
X:1
L:1/4
M:4/4
K:Emin
|:"Em" E B B A | B c B A | G/A/ B A G |"Bm" D E"Em" E2 ::"D" A2 A3/2 B/ | A G F2 |"C" G A B c | 
 B A B/A/ G |"D" A2 A3/2 B/ | A G F2 | F G E E- |"Em" E (D E2) :|  