Compose a piece using the alphabetic notation of the assigned musical structure and the provided melodic motif.
X:1
L:1/8
M:4/4
K:Bb
['Bd FB DF Bd', 'Af cf', 'cA Bf dB F2 BA']  
X:1
L:1/8
M:4/4
K:Bb
 (3FGA | Bd FB DF Bd | fb df Bd cB | ce Ac FA cf | ag f=e gf _ec | Bd FB DF Bd | f2 df Bd cB | 
 GA Bc de =ef | gf (3edc B2 :: cB | Af cf Af cf | AF Ac fc Ac | df Bf df Bf | dB df bf df | 
 =eg cg =eg cg | =ec =eg bg =eg | f=e fa gb ag | f=e fg f2 :: (3^fga | bf df ge cA | Bf dB F2 BA | 
 Ge Ge Fd Fd | Ec c2 dc AF | G^F GA Be cA | Bf dB F2 BA | G2 eG F2 dF | E2 cA B2 :|  