Craft a musical piece in accordance with the designated structure and theme.
X:1
L:1/8
M:6/8
K:D
['FGA ABA ABA AGF', 'ecA ecA'  
X:1
L:1/8
M:6/8
K:D
 A/G/ | FGA ABA | ABA AGF | GAB BAB | BAB BAG | FGA ABA | ABA AGF | GBA GFE | D3 D2 :| c/d/ | 
 ecA ecA | ecA def | fdB fdB | fdB Ace | ecA ecA | ecA B2 c | dfe dcB | A3 A2 :|  