Construct a musical composition using the provided motif and maintain the designated form.
X:1
L:1/4
M:3/4
K:Bmin
['B A', 'B A G F', 'F2 F'  
X:1
L:1/4
M:3/4
K:Bmin
 B2- B | A B c | d2- d | c B A | B2- B | A G F | F G A | B3 :| d3/2 e/ f | d e f | d3/2 e/ f | 
 f e d | c3/2 d/ e | c d e | d c B | f2 e | d3/2 c/ B | A G F | d3/2 c/ B | A G F | d c B | A G F | 
 F G A | B3 ||"^variation" F B B | B2 F | A3/2 G/ F/ E/ | F2 F | F d d | c2 B | A2 A/B/ | c d e | 
 f3/2 e/ d | d3/2 c/ B | B3/2 A/ B | F2 F | E2 E | F2 B | B3/2 c/ d | B3 ||  