Construct a music composition that complies with the designated structure and theme.
X:1
L:1/8
M:3/4
K:F
['f2 e2', 'a>f c2 cAF^F G3 Gdc E2', 'F4 a>a a3 bag fe d2{e} f2', 'f4 AB c3 dc=B cdefga f3 cBA'  
X:1
L:1/8
M:3/4
K:F
 a>f | c4 f>c | A4 c>A | F2 Ac f2 | f2 e2 b>g | f2 e2 b>g | f2 e2 d>c | =Bc d2 e2 | f4 :: a>f | 
 c2 cAF^F | G3 Gdc | E2 EGdc | cB A2 a>f | c2 cAF^F | G3 Gdc | E2 EGdc | F4 :| a>a | a3 bag | 
 fe d2{e} f2 | A2{^g} a2 A2 | f2 efed | c2{^b} c'2 c2 | a2 efed | c2 egd'c' | f4 :: AB | c3 dc=B | 
 cdefga | f3 cBA | A3 BA^G | ABcdef | ed d2 d2 | (d/c/=B/c/) d2 e2 | f4 :|  