Craft a piece of music that integrates both the suggested theme and letter-based structure.
X:1
L:1/8
M:4/4
K:Gdor
['DGGA G^FGA', 'G2 dgga g^fga bgga bg g2 cffg']  
X:1
L:1/8
M:4/4
K:Gdor
|: DGGA G^FGA | BGdG _eGdG | CFFG FEFG | AFcF dFcF | DGGA G^FGA | BABc dcde | fgfd cAFA | 
 BGAF DG G2 :: dgga g^fga | bgga bg g2 | cffg fefg | affg af f2 | dgga bagb | abag fedc | 
 defd cAFA | B/A/GAF DG G2 :|  