Craft a musical work adhering to the specified theme and structure.
X:1
L:1/8
Q:1/2=100
M:4/4
K:C
['GF EFGA G2', 'd2 ef', '_B2 A3 G/F/ G3 A/B/ cB c2'  
X:1
L:1/8
Q:1/2=100
M:4/4
K:C
 GF | EFGA G2 E2 | F2 D2 E2 DC | B,2 D4 GF | EFGA G2 F2 | c2 E2 F2 ED | E2 C4 :| gf efga g2 e2 | 
 f2 d2 e2 dc | B3 c d2 ef | gagf e2 fg | agfe d2 ef | e2 c4 :: _B2 | A3 G/F/ | G3 A/B/ | 
 cB c2 A2 Bc | d2 D4 _B2 | A3 G/F/ G3 A/B/ | cB c2 D2 B2 | c2 C4 :|  