Construct a musical arrangement that blends the supplied motif while maintaining the specified alphabetical order.
X:1
L:1/8
M:2/2
K:Bb
['BA GF']  
X:1
L:1/8
M:2/2
K:Bb
 F2 |"Bb" BF dB fd bf |"F7" dB Ac"Bb" BA GF |"Eb" GE DE"Cm" CE cd |"F7" ec dB BA GF | 
"Bb" BF dB fd bf |"F7" dB Ac"Gm" BA GF |"Cm" GE DE"^(F7)" CE cd |"F7" ec Ac"Bb" B2 :: FE | 
"Bb" DB, FD BF dB |"Bb" fb fd BA GF |"Eb" GB"F7" Ac"Bb" Bd fa |"C7" bg f=e"F" f2"F7" (3(fga) | 
"Bb" bf dB"Cm" ge"F7" cA |"Gm" BG"Cm" ec"F7" BA GF |"Eb" GE DE"Cm" CE cd |"F7" ec Ac"Bb" B2 :|  