Develop a musical piece employing the provided motif and an alphabet-based structure.
X:1
L:1/4
M:4/4
K:G
['d3/2 B/']  
X:1
L:1/4
M:4/4
K:G
 G B | d3/2 B/ d e | d2 B d | e4 | d z B d | d3/2 B/ c B | A2 G A | (B2 A2) | G z :|  