Construct a piece of music built on the supplied alphabet sequence and motif.
X:1
L:1/8
M:6/8
K:G
['', 'B BAB']  
X:1
L:1/8
M:6/8
K:G
 d2 c |: B2 B BAB | d2 B BAB | c2 e g2 e | d2 B BAB | c2 A AGA |1 B2 G G2 B | A2 B A2 B | 
 A3 d2 c :|  