Craft a musical piece in accordance with the designated structure and theme.
X:1
L:1/4
M:2/2
K:C
['C [Ec] [Ec]/[EB]/[Ec]/c/ e c c B/c/', '(3g/a/g/ e c c/A/B/c/ d D B,'  
X:1
L:1/4
M:2/2
K:C
 c/G/ | C [Ec] [Ec]/[EB]/[Ec]/c/ | e c c B/c/ | d [B,D] B [B,D] | B G B, D | 
 C [Ec] [Ec]/[EB]/[Ec]/c/ | e c c B/c/ | d D B, D |[M:2/4] B G |[M:2/2] [Ec]2 [Ec] || e/f/ | 
 g ^f/g/ a (3g/a/g/ | e c c/A/B/c/ | d D B, D | B [G,G]2 e/f/ | g ^f/g/ a (3g/a/g/ | e c c/A/B/c/ | 
 d D B, D |[M:2/4] B G |[M:2/2] [Ec]3 ||  