Develop a piece of music by incorporating the provided motif and following the outlined musical structure represented by alphabet characters.
X:1
L:1/4
Q:1/4=200
M:2/2
K:G
['G A/B/ c e d G B2', 'B2 d']  
X:1
L:1/4
Q:1/4=200
M:2/2
K:G
"^polka" G A/B/ c e | d G B2 | d e/d/ c A | G B B D | G A/B/ c e | d G B2 | d e/d/ c F | A G G2 :| 
 d e/f/ g e | d G B2 | d e/d/ c A | G B B2 | d e/f/ g e | d G B2 | d e/d/ c F | A G G2 :|  