Construct a music composition that complies with the designated structure and theme.
X:1
L:1/8
M:4/4
K:Bmin
['B2 A2', 'f2 ab f2 ef'  
X:1
L:1/8
M:4/4
K:Bmin
|: B2 | B6 B2 | B4 c4 | d4 c4 | c4 B4 | B4 B2 A2 | B4 B2 A2 | B2 c2 d2 e2 | f6 f2 | e4 f4 | a4 f4 | 
 e4 c4 | B6 f2 | f6 e2 | e4 c2 A2 |1 B2 A2 F2 A2 | B6 :|2 B2 A2 F2 A2 | B8 |: f2 ab f2 ef | 
 bB BA B2 BA | f2 fe f2 a2 | b2 ba b=c' ba | f2 ab f2 ef | bB BA B2 Bf | f2 fg fe dc | BA FA B4 | 
 f2 ab f2 ef | ba fb af ba | f2 fe fg a2 | b3 b b=c' ba | f2 ab f2 ef | bB BA B3 f | f3 g fe dc |1 
 BA FA B4 :|2 BA FA B2 ||  