Craft a musical piece that abides by the prescribed structural guidelines and the given theme.
X:1
L:1/8
Q:1/4=100
M:3/4
K:Gmin
['(d2 G2) ^F2 (GA) B2 A2 (Bc)', 'e2 d2'  
X:1
L:1/8
Q:1/4=100
M:3/4
K:Gmin
{Bc} (d2 G2) ^F2 | (GA) B2 A2 | (Bc) d2 g2 | (^fga)(cBA) |{Bc} (d2 G2) ^F2 | (GA) B2 A2 | (Bc) d4 | 
 c2 d4 :: (de) d2 g2 | f2 (edcB) | cd e2 d2 | c4 c2 | e2 d2 c2 | B4 A2 | GFGA G2 | A2 (GFED) | 
 d2 (cBAG) | g2 (fedc) | B2 (cBAB) | G6 :|  