Construct a musical piece using the designated motif and sticking to the alphabetical form presented.
X:1
L:1/8
Q:1/2=70
M:4/4
K:Bb
['B2 dF', 'B2 dF']  
X:1
L:1/8
Q:1/2=70
M:4/4
K:Bb
 Bc | d2 e2 f2 F2 | G>BA>c B2 dF | G2 eG A2 fe | dcBA B2 dF | GceB Agfe | dc B2 z fga | 
 bB(ba) (ag)(gf) | (f=e)(ed) (dc)(cB) | AcfA G2 =e2 | f2 F4 :: FG | A2 B2 c2 d2 | egfe d2 b2 | 
 a2 g2 bag^f | g2 f4 ed | e2 c2 edc=B | c2 B4 AG | A2 f2 G2 =e2 | f2 e4 dc | dfba gfed | 
 cBAG F2 Bc | d2 e2 f2 F2 | GBAc B2 dF | G2 eG A2 fe | dcBA B2 dF | GceB Agfe | dfga bB(ba) | 
 (ag)(gf) (fe)(ed) | (dc)(cB) Agfe | d2 cB F2 A2 | B6 :|  