Develop a musical piece using the given theme and incorporating the letter-based structure provided.
X:1
L:1/8
M:4/4
K:Bdor
['', 'edcd B/B/B', 'cAec BFDF BcdB |1 cAac B/B/BBc :|2', 'BFDB, DFBd']  
X:1
L:1/8
M:4/4
K:Bdor
 b |: fBBA B2 Af | eAce fecb | fBBA Bcdf |1 edcd B/B/B Bb :|2 edcd B/B/B Bc |: BFDF BcdB | 
 cA[AE]A cAec | BFDF BcdB |1 cAac B/B/BBc :|2 cAac B/B/BBA || Bbb^a bffg | aefa cAAc | 
 Bbb^a bf=ge | fdec dBBA | Bbb^a bffg | aefa cAAc | dcBc defd | caec B/B/BBc |: BFDB, DFBd | 
 cAED CEAc | BFDB, DFBd |1 cAac B/B/BBc :|2 cAac B/B/B B2 ||  