Craft a musical piece that abides by the prescribed structural guidelines and the given theme.
X:1
L:1/8
M:4/4
K:Emin
['gf edBA GEDE G2 BG dGBd e2', 'dega bg g2', 'ea ge dega bg g2 agef g3'  
X:1
L:1/8
M:4/4
K:Emin
 gf | edBA GEDE | G2 BG dGBd | e2 dB A2 GA | Beed ef :| ge | dega bg g2 | agef g3 e | dega bg g2 | 
 aged ea || ge | dega bg g2 | agef g3 a | bgaf gfed | Beed e2 |]  