Craft a musical piece in accordance with the designated structure and theme.
X:1
L:1/8
Q:1/8=120
M:6/8
K:A
['A>BA B2 c', 'a>gf e>dc'  
X:1
L:1/8
Q:1/8=120
M:6/8
K:A
"^A" E | A>BA B2 c | d>cB e>dc | A>BA B2 c | dBG A2 |:"^B" E | a>gf e>dc | B>cd c>BA | a>gf e>dc | 
 B>cd c2 e | a>gf e>dc | B>cd c>BA | a>gf e>dc | B>AB A2 :|  