Craft a musical piece that abides by the prescribed structural guidelines and the given theme.
X:1
L:1/8
Q:3/8=100
M:6/8
K:A
['eae eae faf', 'agf edc'  
X:1
L:1/8
Q:3/8=100
M:6/8
K:A
 eae eae | faf e3 | def edc | BcA GFE | eae eae | faf edc | def edc | BAG A3 :: BcB BGE | Bcd c3 | 
 efe ecA | ef=g f2 ^g | agf edc | def e2 g | agf edc | BAG A3 :|  