Craft a musical piece that incorporates the given motif and follows the outlined structure.
X:1
L:1/8
M:4/4
K:Bb
['DF BF', 'B,2 Bc dB fB gB fB dB'  
X:1
L:1/8
M:4/4
K:Bb
 FE | DF BF EG cG | DF BF d2 FE | DF BF EG Be | dB Ac B2 B,2 :: Bc | dB fB gB fB | dB ed cA GF | 
 DF BF EG Be | dc Ac B2 B,2 :|  