Craft a musical composition that adheres to the specified musical theme and letter-based structure.
X:1
L:1/8
Q:1/4=200
M:2/2
K:Edor
['B2 AF BFAF', 'eB B2 egfe']  
X:1
L:1/8
Q:1/4=200
M:2/2
K:Edor
|: B2 AF BFAF | EDEF EDB,D | B2 AF BFAF | DFBA FE E2 | B2 AF BFAF | EDEF EDB,A, | B,E E2 DEFA | 
 dBAF FE E2 :: eB B2 egfe | fd d2 Adfd | eB B2 egfe | dBAF FE E2 | eB B2 egfe | d2 fd Adfd | 
 B3 d efge | dBAF FE E2 :|  