Create music using the given musical theme and adhere to the outlined letter-based structure.
X:1
L:1/8
Q:1/4=200
M:4/4
K:G
['(3DEF GFGA Bded BdBG DGBG AGFE DFAc', 'fdAd fagf eGFE DFAc', 'GGBG GcGG BGGc GGBG FGAB cAFD']  
X:1
L:1/8
Q:1/4=200
M:4/4
K:G
 (3DEF | GFGA Bded | BdBG DGBG | AGFE DFAc | BdBG D2 (3DEF | GFGA Bded | BdBG DGBG | AGFE DFAc | 
 BGGF G2 :: Bd | gfga gfeg | fdAd fagf | eGFE DFAc | BGBc d2 ef | gfga gfef | fdAd fagf | 
 eGFE DFAc | BGGF G2 :: DEF | GGBG GcGG | BGGc GGBG | FGAB cAFD | GABc dDEF | GGBG GcGG | 
 BGGc GGBG | FGAB cAFD | GBAF G2 :|  