Design a musical arrangement using the alphabetical representation of the given sequence and the supplied motif.
X:1
L:1/8
Q:1/2=80
M:3/2
K:Bb
['E4 (GB)(eg) (fd)(ec) (cB)(_AG) _A2 (cB) (_AG)(FE)', 'E4 f4 B2 d2 f2 _a2 (fedc)']  
X:1
L:1/8
Q:1/2=80
M:3/2
K:Bb
 E4 (GB)(eg) (fd)(ec) | (cB)(_AG) _A2 (cB) (_AG)(FE) | D2 F2 (ge)(fd) (ed)(BG) | 
 (Gc)"^NB"(ec) (B_A)(GF) E4 || f4 B2 d2 f2 _a2 | (fedc) (B_AGF) (GEDE) | c4 e2 g2 c4 | 
 f2 (_ag) (fedc) c2 =B2 | c2 (de) B2 _AG _AB c2 | F2 G_A C2 FG EDCB, | (egfe) (dfbd) (eBc_A) | 
 GBe_A FedF E4 |]  