Craft a musical piece that abides by the prescribed structural guidelines and the given theme.
X:1
L:1/8
Q:1/8=180
M:6/8
K:Gmin
['B2 G AFD', 'Bcd cBA BAG AFD'  
X:1
L:1/8
Q:1/8=180
M:6/8
K:Gmin
|: A | B2 G AFD | B2 G AFD | F2 F F2 c | F2 F F2 A | B2 G AFD | B2 G AFD | G2 G G2 d | G2 G G2 :: 
 A | Bcd cBA | BAG AFD | fgf fcA | fgf fcA |1 Bcd cBA | BAG AFD | gag gdB | gag gdA :|2 Bcd cde | 
 dcB cBA | G2 G G2 d | G2 G G2 ||  