Craft a musical piece in accordance with the designated structure and theme.
X:1
L:1/8
M:3/4
K:G
['GD G2 Bd gf e2 ge dB', 'gf e2 ge dB'  
X:1
L:1/8
M:3/4
K:G
 G | GD G2 Bd | gf e2 ge | dB G2 AB | AG E3 E/F/ | GD G2 Bd | gf e2 ge | dB B>A GA | GG G3 |] d | 
 dB d2 ef | gf e2 ge | dB G2 AB | AG E3 F | GD G2 Bd | gf e2 ge | dB B>A GA | GG G3 |]  