Compose a piece of music using the specified alphabetical notation system and the provided theme.
X:1
L:1/8
M:2/4
K:Bb
['f2 f2']  
X:1
L:1/8
M:2/4
K:Bb
 b>g f2 | b>g f2 | ffcc/d/ | f2 df | c4 | cc/d/gg | f2 f2 | cc/d/gg | f2 f2 | gg/b/cd | b2 b2 | 
 gg/b/cd | b2 b2 | d>gff | dg f2 | fd c2 | c2 c2 | gc c2 | bg f2 | f2 df | b2 bg | f4 |]  