Compose a piece of music using the specified alphabetical notation system and the provided theme.
X:1
L:1/8
M:2/2
K:Bb
['F B2']  
X:1
L:1/8
M:2/2
K:Bb
"Bb6" F B2 F B2 Bc |"Cm7" ed c2"Bb6" d4 | f2 fg fe d2 |"Cm7" cBAG"F7" F4 |"Bb6" F B2 F B2 Bc | 
"Cm7" ed c2"Bb6" d4 | f2 fg fe d2 |"F7" cB A2"Bb6" B4 ::"Gm7" g2 ga ba g2 |"Bb6" fdfg f4 | 
"F7" c2 cd"Cm7" ed c2 |"Bb6" Bcde f3 b |"Eb6" g2 ga"Gm7" ba g2 |"Bb6" fdfg f4 | 
"Bb6" F B2 c"Cm7" ed c2 |"F7" cB A2"Bb6" B4 :|  