Utilizing the provided musical theme and letter-based structure, compose a piece of music.
X:1
L:1/8
M:6/8
K:G
['G2 e dBG', 'g edB deg age dBG AGA']  
X:1
L:1/8
M:6/8
K:G
 G2 e dBG |{c} BAB dBG | G2 e dBG |{B} AGA BGD | G2 e dBG |{c} BAB deg | age dBG |{B} AGA BGD :: 
 gag f2 f | ede def |{a} gfg efg | aga bge | gbg a2 g | edB deg | age dBG | AGA BGD :|  