Develop a musical composition in line with the given structure and theme.
X:1
L:1/8
Q:1/4=175
M:4/4
K:C
['ABcd{d} e2 e2 e^fdf{f} e2 c2 cBdB{B}', 'g2 e2', 'defd e2 e2 ^f2 ^g2 a2 a2'  
X:1
L:1/8
Q:1/4=175
M:4/4
K:C
 ABcd{d} e2 e2 | e^fdf{f} e2 c2 | cBdB{B} c2 Ac | BA^GB A2 z2 :|[K:A]{g} a2 a2 a2 ba | g2 e2 e4 | 
 dcBc defa | g2 e2 e2 fg |{g} a2 a2 a2 ba | g2 e2 e4 | dcBc dBGB | A2 c2 A2 z2 ||[K:C] a2 a2 g3 f | 
 edef ecAB | c2 c2 defd | e2 e2 ^f2 ^g2 | a2 a2 g3 f | edef ecAB | c2 c2 BdcB | A2 c2 A2 z2 |]  