Craft a musical piece in accordance with the designated structure and theme.
X:1
L:1/8
M:4/4
K:G
['g2 B2 cBAG ABcA B2 AG FGAB', 'e2 B2 efge fgaf gfeg'  
X:1
L:1/8
M:4/4
K:G
 g2 B2 cBAG | ABcA B2 AG | FGAB cBAc | BcdB cdef | g2 B2 cBAG | ABcA B2 AG | FGAB cBAc | 
 BGGF G2 Bd :| e2 B2 efge | fgaf gfeg | f2 B2 fgaf | gfed BABd | e2 B2 efge | fgaf gfeg | 
 fgaf gfef | gdBd cdef :|  