Create a musical composition employing the given alphabetic structure and melodic theme.
X:1
L:1/4
M:6/4
K:B
['f e2']  
X:1
L:1/4
M:6/4
K:B
 f | B2 =d c2 e | =d2 c B2 f | =g2 f e2 f | e2 =d c2 f | =g2 f e2 f | e2 =d c2 c | =d2 c B2 c | 
 =d2 e f2 f | =a2 =g f2 e | =g2 f e3 | =d3- d2 f | B2 c =d2 e | f3- f2 f | B2 c =d2 e | f3- f2 f | 
 =g2 e c2 e | f2 =d c3 | B3- B2 |]  