Craft a musical piece in accordance with the designated structure and theme.
X:1
L:1/8
M:6/8
K:G
['edc BAG', 'B/c/dB B/c/dB'  
X:1
L:1/8
M:6/8
K:G
 g/f/ | edc BAG | B>cB Bgf | edc BAG | [FA][GB][FA] [FA]2 g/f/ | edc BAG | B<cB B2 d | 
 def g2 [GB] | [FA][GB][FA] [FA]2 :: c | B/c/dB B/c/dB | B/c/dB d2 g | c/d/ec c/d/ec | 
 c/d/ec e2 f | g2 a b2 a | g2 e edB | def [Bg]2 [GB] | [FA][GB][FA] [FA]2 :|  