Utilizing the provided musical theme and letter-based structure, compose a piece of music.
X:1
L:1/8
M:4/4
K:G
['GEDE GABd dBeB dBAB GEDE G2 eB', 'E2 g3 e f2 ed']  
X:1
L:1/8
M:4/4
K:G
 GEDE GABd | dBeB dBAB | GEDE G2 eB | dBAB GE E2 | GEDE GABd | dBeB dBAB | GEDE G2 eB | 
 dBAc BE E2 || g3 e f2 ed | Be e2 Be e2 | gfeg fedB | AcBA GE E2 | g3 e f2 ed | Beed e3 f | 
 gabg fgaf | dBAc BEED ||  