Compose music using the given motif and the alphabetically represented musical sequence.
X:1
L:1/8
M:4/4
K:Bb
['G2 ec B2 A2']  
X:1
L:1/8
M:4/4
K:Bb
 B2 | f3 d e2 c2 | d3 c B2 d2 | c2 dB A2 G2 | F4 z2 F2 | c3 e d3 f | f2 e2 c2 dB | G2 ec B2 A2 | 
 Bcde f2 F2 | G2 ec B2 A2 | B4 z2 |]  