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
['g eAA edB', 'g aAA edB'  
X:1
L:1/8
M:6/8
K:G
 g | eAA edB | eAA A2 g | eAA edB | dBG G2 g | eAA edB | cBA a2 e | gag g2 e | dBG G2 :| g | 
 aAA edB | AAA A2 g | aAA edB | gGG G2 g | agf edB | cBA a2 e | gab efg | dBG G2 :|  