Develop a musical composition in line with the given structure and theme.
X:1
L:1/8
M:4/4
K:Amix
['e>c e>fec', '(e<f) ce'  
X:1
L:1/8
M:4/4
K:Amix
 uc | vA<uA (e>.c) (e>.f)ec | vA<uA (ve>.c) (uf<e) c2 | uA<vA"^SEGUE" e>c e>fec | 
 uf>ga>f (e<c) Bc | vA<uA e>c e>fec | vA<uA e>c (f<e) c2 | uA<vA e>c e>fec | f>ga>f (e<c)B |] ue | 
 (va>.b)af (ue>.f)ec | (va>.b)af (e<f) ce |"^SEGUE" a>baf e>fec | f>^gaf (e<c)Be | a>baf e>fec | 
 a>baf (e<f) ce | a>bf>a e>fc>e | f>^gaf (e<c)B |]  