Create musical pieces following the given structure and incorporating the suggested musical concept.
X:1
L:1/8
M:2/2
K:Bb
['BfdB fBdB eBgB fBdB', 'B2 f2 f2 (df) (cf)(df) babf edcB'  
X:1
L:1/8
M:2/2
K:Bb
 F2 | BfdB fBdB | eBgB fBdB | FBdB dBdB | AcBG F2 (GA) | BfdB fBdB | eBgB fBdB | Ggfe dcBA | 
 B2 d2 B2 :: f2 | f2 (df) (cf)(df) | babf edcB | DFBD EGcB | A2 F2 F2 (GA) | Bdfd cege | 
 dfga babf | gfdB AFGA | B2 d2 B2 :|  