Craft a musical piece that abides by the prescribed structural guidelines and the given theme.
X:1
L:1/4
M:3/4
K:G
['G A']  
X:1
L:1/4
M:3/4
K:G
 D/D/ G A | B2 A/A/ | G B B | G B B G G A | B2 G | A B G | D G A | B2 B | d c A | G2 z |]  