Develop a piece of music by incorporating the provided motif and following the outlined musical structure represented by alphabet characters.
X:1
L:1/8
Q:1/8=320
M:6/8
K:Emin
['gag gab abg fga', 'dec BcA', 'dgg a f/g/a/f/ dfa', 'GBB dBB gfe dBB GBA BGE E2']  
X:1
L:1/8
Q:1/8=320
M:6/8
K:Emin
 (3d/e/f/ | gag gab | abg fga | gfg eag | fdB BAB | gag gab | abg fga | gfe afd | e3 e2 :|"^2" g | 
 dec BcA | GBd gfe | dec BcA | BGE E3 | dec BcA | GBd g2 a | bge afd | e3 e2 :|"^3" g/a/ | 
 bgg dgg | a f/g/a/f/ dfa | gfg efg | fdB B2 g | bgg dgg | a f/g/a/f/ dfa | gfe afd | e3 e2 :| 
"^4" g | dBB GBB | dBB gfe | dBB GBA | BGE E2 e | dec BcA | GBd g2 a | bc'b agf | e3 e2 :|  