Create music using the given musical theme and adhere to the outlined letter-based structure.
X:1
L:1/8
M:4/4
K:Gdor
['BG G2', 'B2 fB gBfB']  
X:1
L:1/8
M:4/4
K:Gdor
 A | BG G2 BGdc | dBGB AFFA | BG G2 Bcde | fdcB ADFA | BG G2 BGdc | (3BdB GB AFFA | BG G2 Bcde | 
 fdcB AGFA || B2 fB gBfB | B2 fd cAFA | B2 fB gBfB | cedc BGGA | B2 fB gBfB | B2 fd cAFA | 
 GABd bage | fdcB ADFA ||  