Create music using the given musical theme and adhere to the outlined letter-based structure.
X:1
L:1/8
Q:1/2=80
M:4/4
K:Bb
['(3FGA BfdB GecA BcdB F2', '(3dcB Acf=e f2']  
X:1
L:1/8
Q:1/2=80
M:4/4
K:Bb
 (3FGA | BfdB GecA | BcdB F2 (3GFE | DFBd edcB | Acf=e f2 (3FGA | BfdB GecA | BcdB F2 dc | 
 Bgfe dcBA | B2 B2 B2 :: (3dcB | Acf=e f2 (3dcB | Acf=e f2 (3bag | =egba bagf | 
 (3gag (3f=ed c2 (3cdB | BfdB GecA | BcdB F2 FE"^bar line added" | Dgfe dcBA | B2 B2 B2 :|  