Craft a musical piece that abides by the prescribed structural guidelines and the given theme.
X:1
L:1/8
M:2/4
K:C
['cA GE', 'ef g2 fe da a>^g ad d/f/e/d/'  
X:1
L:1/8
M:2/4
K:C
|: e/d/ | cA GE | G>A GE/G/ | cB/c/ dc/d/ | ed d/f/e/d/ | cA GE | G2 GE/G/ | cc d/4e/4d/c/d/ |1 
 ec c :|2 ec c3/2 |: d/ | e^d ef | g2 fe | da a>^g | ad d/f/e/d/ | c>A GE | G/A/G/E/ GA/B/ | 
 cB/c/ d^c/d/ |1 ec c3/2 :|2 ec c ||  