Using the provided alphabet sequence and motif, develop a unique musical composition.
X:1
L:1/8
M:2/4
K:G
['G A B']  
X:1
L:1/8
M:2/4
K:G
 d d e d | d A d2 | A G A B | F E D2 | G F E G | A B A2 | d2 A d | G F A E | D4 |]  