Craft a musical piece that abides by the prescribed structural guidelines and the given theme.
X:1
L:1/8
Q:1/8=160
M:2/4
K:G
['G/A/ BBB A/G/', 'B/c/ dBgB'  
X:1
L:1/8
Q:1/8=160
M:2/4
K:G
 G/A/ | BBB A/G/ | BBB g/e/ | dBB A/G/ | FAA G/A/ | BBB A/G/ | Bd ga | b/a/g/f/ e/f/g/e/ | 
 dB"^crot" B :: B/c/ | dBgB | dBB B/c/ | dBgB | aAA G/A/ | BBB A/G/ | Bd g a | 
 b/a/g/f/"^Qu's" e/f/g/e/ | dB"^crot" B :|  