Construct a music composition that complies with the designated structure and theme.
X:1
L:1/8
M:6/8
K:F
['BAG AFD']  
X:1
L:1/8
M:6/8
K:F
 CDF FGF | cAF AG^F | GAB fdB | cAF GFD | CDF (3FGA F | cAF AG^F | G2 G BAG | AFD DFD | 
 C2 _A =AGF | cAF AG^F | G2 A Bcd | fed cAF | DFF CFF | B,FF A,FF | DFA BAG | AFD DFA | d3 fed | 
 e_e=e A=B^c | d2 A fed | agf gec | d2 d fed | e^ce AGF | G2 A BAG | AFD DFA | d3 fed | 
 e_e=e A=B^c | d2 A fed | afa def | a/g/fd gec | fed cAF | G2 A BAG | AFD (3DEF D ||  