Craft a musical piece that abides by the prescribed structural guidelines and the given theme.
X:1
L:1/8
M:6/8
K:A
['Ace a3 age f3 fed cAc', 'c2 c'  
X:1
L:1/8
M:6/8
K:A
 Ace a3 | age f3 | fed cAc | Bc^d e3 | Ace a3 | age f3 | fed cAc | BAG A3 :| B2 B c2 c | 
 d2 d c2 c | B2 B c2 c | dcA B2 A | B2 B c2 c | d2 d c2 e | agf edc | BAG A3 :|  