Craft a musical piece that abides by the prescribed structural guidelines and the given theme.
X:1
L:1/8
M:6/8
K:G
['GED G2 A', 'edB Add fdd ed^c def gfg aga'  
X:1
L:1/8
M:6/8
K:G
 GED G2 A | B3 ABd | edd gdd | edB dBA | GED G2 A | BdB A (3Bcd | edd gdB |1 AGF GBA :|2 AGF GBd || 
 gfg efg | afd edB | Add fdd | ed^c def | gfg aga | bag fgf | edc B2 A | BGF GBd :|  