Craft a musical piece that abides by the prescribed structural guidelines and the given theme.
X:1
L:1/8
M:9/8
K:Amix
['fed eAA', 'faf g2'  
X:1
L:1/8
M:9/8
K:Amix
|: fed eAA eAA | fed eAA BAG | fed eAA A2 c | def gdB BAA :| g3 faf g2 f | eaa aga bge | 
 gbg faf g2 c | def gdB BAA | g3 faf g2 f | eaa aga bge | bag agf g2 c | def gdB BAA ||  