Develop a musical composition in line with the given structure and theme.
X:1
L:1/8
M:6/8
K:D
['f2 A ABA B2 A ded c2', 'b3 a2'  
X:1
L:1/8
M:6/8
K:D
 f2 A ABA | B2 A ded | c2 B BAB | g2 g f2 e | f2 A ABA | B2 A ded | c2 c cBc |1 d3 d2 e :|2 
 d3 def |: g2 g gfe | f2 f fed | Bee efe | d2 B BAB | g2 g gfe | f2 f fed | Bcd efa |1 b3 a2 f :|2 
 b3 a2 g ||  