Produce music using the specified musical structure depicted in letters along with the provided musical theme.
X:1
L:1/4
Q:1/4=150
M:7/8
K:Ephr
['B B', 'A A']  
X:1
L:1/4
Q:1/4=150
M:7/8
K:Ephr
 A B B B/ | B B B G/ | A A A F/ | G G/G/ G z/ :| A A A F/ | G G G E/ | F F F D/ | E E/E/ |1 
 A z/ :|2 E z/ |]  