Craft a musical piece in accordance with the designated structure and theme.
X:1
L:1/8
M:6/8
K:A
['', 'fed cAA', 'cee dff'  
X:1
L:1/8
M:6/8
K:A
 g |: fed cAA | eAA cBA | fed cAA | BGB dBG | fed cAA | cAA efg | f<af gfe | dBG Bcd :: cee dff | 
 cee ecA | cee dff | dBG Bcd | cee dff | cAA efg | (f<a)f gfe | dBG Bcd :|  